From ac4ae00a99d16f2b61eec74e28fa637c99d40245 Mon Sep 17 00:00:00 2001
From: Dylan Sarrazyn <sarrazyndylan@gmail.com>
Date: Tue, 22 Oct 2024 17:21:42 +0200
Subject: [PATCH] Code cleanup. Removes Godot warnings. Removes unused import
 functions from the Database.

---
 resources/gardens/garden.gd                   |   2 +-
 resources/gardens/garden_flower.gd            |   8 +-
 resources/gardens/garden_flower.tscn          |   2 -
 resources/gardens/garden_layout.gd            |   4 +-
 resources/user/teacher_settings.gd            |  30 +--
 sources/gardens/gardens.gd                    | 107 +++++----
 sources/gardens/minigame_layout.gd            |   4 +-
 sources/lesson_screen/lesson_button.gd        |   2 +-
 sources/look_and_learn/letter_segment.gd      |  11 +-
 sources/look_and_learn/look_and_learn.gd      |  25 +-
 sources/look_and_learn/look_and_learn.tscn    |   1 -
 sources/look_and_learn/tracing_effects.gd     |   6 +-
 sources/look_and_learn/tracing_manager.gd     |  18 +-
 sources/look_and_learn/tracing_path.gd        |  24 +-
 .../language_selection/package_downloader.gd  |  20 +-
 sources/menus/main/kalulu.gd                  |  12 +-
 sources/menus/main/language_field.gd          |   6 +-
 sources/menus/main/login.gd                   |  14 +-
 sources/menus/main/main_menu.gd               |  21 +-
 sources/menus/splash_screen/splash_screen.gd  |   4 +-
 .../base/MinigameAudioStreamPlayer.gd         |   2 +-
 sources/minigames/base/base_minigame.gd       |  24 +-
 sources/minigames/base/kalulu.gd              |   4 +-
 sources/minigames/base/minigame_ui.gd         |  29 +--
 sources/utils/autoloads/Database.gd           | 219 ++----------------
 sources/utils/autoloads/lesson_logger.gd      |  13 +-
 sources/utils/autoloads/opening_curtain.gd    |   2 +-
 sources/utils/autoloads/server_manager.gd     |   7 +-
 sources/utils/autoloads/user_data_manager.gd  |  20 +-
 sources/utils/fx/fireworks.gd                 |  18 +-
 sources/utils/fx/rocket.gd                    |  16 +-
 sources/utils/keyboard_spacer.gd              |   7 +-
 sources/utils/math/bezier.gd                  |   4 +-
 sources/utils/minigame_resources/log.gd       |   7 +-
 34 files changed, 271 insertions(+), 422 deletions(-)

diff --git a/resources/gardens/garden.gd b/resources/gardens/garden.gd
index ae733ca2..3cebbb24 100644
--- a/resources/gardens/garden.gd
+++ b/resources/gardens/garden.gd
@@ -22,7 +22,7 @@ const background_path_model: = "res://assets/gardens/gardens/garden_%02d_open.pn
 	%Flower4,
 	%Flower5,
 ]
-@onready var background: = %Background
+@onready var background: TextureRect = %Background
 @onready var lesson_button_controls: Array[LessonButton] = [
 	%Button1,
 	%Button2,
diff --git a/resources/gardens/garden_flower.gd b/resources/gardens/garden_flower.gd
index 07c76186..46ec679e 100644
--- a/resources/gardens/garden_flower.gd
+++ b/resources/gardens/garden_flower.gd
@@ -7,7 +7,7 @@ extends Node2D
 @onready var sprite: Sprite2D = %Sprite
 
 
-func _ready():
+func _ready() -> void:
 	if texture:
 		_set_texture(texture)
 
@@ -16,9 +16,5 @@ func _set_texture(p_texture: Texture) -> void:
 	texture = p_texture
 	sprite.texture = p_texture
 	
+	@warning_ignore("integer_division")
 	sprite.position.y = -sprite.texture.get_height() / 2
-
-
-func _on_area_2d_input_event(viewport, event, shape_idx):
-	if event.is_action_pressed("left_click"):
-		print("CLICKKKKK")
diff --git a/resources/gardens/garden_flower.tscn b/resources/gardens/garden_flower.tscn
index 0bf9b150..514c91cf 100644
--- a/resources/gardens/garden_flower.tscn
+++ b/resources/gardens/garden_flower.tscn
@@ -24,5 +24,3 @@ position = Vector2(2312, 1544)
 rotation = -3.14159
 scale = Vector2(1, -1)
 polygon = PackedVector2Array(1030, -1546, -250, -1546, -250, 254, 1030, 254, 774, 225, 630, 163, 449, 44, 264, -167, 163, -383, 125, -619, 158, -890, 251, -1101, 390, -1282, 563, -1416, 710, -1490, 838, -1522)
-
-[connection signal="input_event" from="Area2D" to="." method="_on_area_2d_input_event"]
diff --git a/resources/gardens/garden_layout.gd b/resources/gardens/garden_layout.gd
index 82eb0628..588b93de 100644
--- a/resources/gardens/garden_layout.gd
+++ b/resources/gardens/garden_layout.gd
@@ -14,7 +14,7 @@ class Flower:
 		position = p_position
 	
 	static func from_dict(d: Dictionary) -> Flower:
-		return Flower.new(d.color, d.type, d.position)
+		return Flower.new(d.color as int, d.type as int, d.position as Vector2i)
 	
 	func to_dict() -> Dictionary:
 		return {
@@ -33,7 +33,7 @@ class LessonButton:
 		path_out_position = p_path_out_position
 	
 	static func from_dict(d: Dictionary) -> LessonButton:
-		return LessonButton.new(d.position, d.path_out_position)
+		return LessonButton.new(d.position as Vector2i, d.path_out_position as Vector2i)
 	
 	func to_dict() -> Dictionary:
 		return {
diff --git a/resources/user/teacher_settings.gd b/resources/user/teacher_settings.gd
index 6e70ae6d..6f935782 100644
--- a/resources/user/teacher_settings.gd
+++ b/resources/user/teacher_settings.gd
@@ -54,10 +54,11 @@ func update_from_dict(dict: Dictionary) -> void:
 	last_modified = dict.last_modified
 	
 	students.clear()
-	for device: String in dict.students.keys():
+	var d_students: Dictionary = dict.students
+	for device: String in d_students.keys():
 		var device_students: Array[StudentData] = []
 		for s: Dictionary in dict.students[device]: 
-			var student = StudentData.new()
+			var student: = StudentData.new()
 			student.code = str(s.code)
 			student.name = s.name
 			student.age = s.age
@@ -67,16 +68,16 @@ func update_from_dict(dict: Dictionary) -> void:
 		students[int(device)] = device_students
 
 func get_new_code() -> String :
-	var used_codes = []
-	for student_array in students.values():
-		for student in student_array:
+	var used_codes: = []
+	for student_array: Array[StudentData] in students.values():
+		for student: StudentData in student_array:
 			used_codes.append(student.code)
 	
 	if used_codes.size() == available_codes.size():
 		return ""
 	
-	var codes = available_codes.duplicate()
-	for c in used_codes:
+	var codes: = available_codes.duplicate()
+	for c: String in used_codes:
 		codes.erase(c)
 	
 	var code : String = codes.pick_random()
@@ -87,16 +88,16 @@ func get_students_count() -> int :
 	if not students:
 		return 0
 	
-	var count = 0
-	for device in students.keys():
-		var students_array = students[device] as Array
+	var count: = 0
+	for device: int in students.keys():
+		var students_array: = students[device] as Array
 		if students_array:
-			count += students[device].size()
+			count += students_array.size()
 	
 	return count
 
 func to_dict() -> Dictionary:
-	var dict = {
+	var dict: = {
 		"account_type": account_type,
 		"email": email,
 		"password": password,
@@ -104,9 +105,10 @@ func to_dict() -> Dictionary:
 	}
 	
 	dict["students"] = {}
-	for device in students.keys():
+	for device: int in students.keys():
 		dict["students"][device] = []
+		var device_students: Array = dict["students"][device]
 		for s: StudentData in students[device]: 
-			dict["students"][device].append(s.to_dict())
+			device_students.append(s.to_dict())
 	
 	return dict
diff --git a/sources/gardens/gardens.gd b/sources/gardens/gardens.gd
index de5a893a..13176b39 100644
--- a/sources/gardens/gardens.gd
+++ b/sources/gardens/gardens.gd
@@ -24,13 +24,13 @@ const garden_size: = 2400
 @export var minigames_scenes: Array[PackedScene]
 @export var minigames_icons: Array[Texture]
 
-@onready var garden_parent: = %GardenParent
+@onready var garden_parent: HBoxContainer = %GardenParent
 @onready var locked_line: Line2D = $ScrollContainer/LockedLine
 @onready var unlocked_line: Line2D = $ScrollContainer/UnlockedLine
 @onready var line_particles: GPUParticles2D = %LineParticles
 @onready var line_audio_stream_player: AudioStreamPlayer = %LineAudioStreamPlayer
 @onready var scroll_container: ScrollContainer = $ScrollContainer
-@onready var parallax_background: = %ParallaxBackground
+@onready var parallax_background: ParallaxBackground = %ParallaxBackground
 @onready var minigame_selection: Control = %MinigameSelection
 @onready var lesson_button: LessonButton = %LessonButton
 @onready var lesson_button_particles: GPUParticles2D = %LessonButtonParticles
@@ -48,10 +48,10 @@ const garden_size: = 2400
 
 
 var lessons: = {}
-var points: = []
+var points: Array[Array]= []
 var is_scrolling: = false
 var scroll_beginning_garden: = 0
-var tween: Tween
+var scroll_tween: Tween
 
 var in_minigame_selection: = false
 var current_lesson_number: = -1
@@ -87,7 +87,7 @@ func _ready() -> void:
 		if starting_garden == -1:
 			var lesson_ind: = 1
 			for garden_ind in garden_parent.get_child_count():
-				var garden_control: = garden_parent.get_child(garden_ind)
+				var garden_control: Garden = garden_parent.get_child(garden_ind)
 				if starting_garden != -1:
 					break
 				if not lesson_ind in lessons:
@@ -111,22 +111,21 @@ func _ready() -> void:
 		
 		# Finds the button
 		var lesson_ind: int = 1
-		var lesson_button: LessonButton
-		for garden_control in garden_parent.get_children():
+		var current_lesson_button: LessonButton
+		for garden_control: Garden in garden_parent.get_children():
 			for i in garden_control.lesson_button_controls.size():
-				if lesson_button:
-					break
 				if lesson_ind == transition_data.current_lesson_number:
-					lesson_button = garden_control.lesson_button_controls[i]
+					current_lesson_button = garden_control.lesson_button_controls[i]
 					break
 				lesson_ind += 1
 				pass
 		
 		# Re-open the minigames layout
 		# If the minigame is completed: play an animation
-		await _open_minigames_layout(lesson_button, transition_data.current_lesson_number, transition_data.current_garden, transition_data.current_button_global_position)
+		await _open_minigames_layout(current_lesson_button, transition_data.current_lesson_number as int, transition_data.current_garden as int, transition_data.current_button_global_position as Vector2)
 	
 	scroll_container.scroll_horizontal = garden_size * starting_garden
+	@warning_ignore("integer_division")
 	scroll_beginning_garden = scroll_container.scroll_horizontal / garden_size
 	
 	await OpeningCurtain.open()
@@ -149,11 +148,11 @@ func _unlock_new_lesson() -> void:
 	await get_tree().create_timer(1).timeout
 	await _close_minigames_layout()
 	
-	var lesson_ind = 1
+	var lesson_ind: = 1
 	var last_lesson_button: LessonButton
 	var new_lesson_button: LessonButton
 	var is_last_lesson_of_garden: bool = false
-	for garden_control in garden_parent.get_children():
+	for garden_control: Garden in garden_parent.get_children():
 		for i in garden_control.lesson_button_controls.size():
 			if lesson_ind == max_lesson + 1:
 				new_lesson_button = garden_control.lesson_button_controls[i]
@@ -174,19 +173,23 @@ func _unlock_new_lesson() -> void:
 	# Fill in the path towards the next lesson
 	var curve: = Curve2D.new()
 	for i in range(max_lesson-1, max_lesson + 1):
-		curve.add_point(points[i][0], points[i][1], points[i][2])
+		curve.add_point(points[i][0] as Vector2, points[i][1] as Vector2, points[i][2] as Vector2)
 	
 	var baked_points: = curve.get_baked_points()
 	
 	# Check if we need to scroll to the next garden
 	if is_last_lesson_of_garden:
+		@warning_ignore("integer_division")
 		scroll_beginning_garden = scroll_container.scroll_horizontal / garden_size
 		var target_scroll: int = scroll_beginning_garden * garden_size + garden_size
-		var tween = create_tween()
+		var tween: = create_tween()
 		tween.set_ease(Tween.EASE_IN_OUT)
 		tween.tween_property(scroll_container, "scroll_horizontal", target_scroll, 4)
+		@warning_ignore("integer_division")
 		scroll_beginning_garden = target_scroll / garden_size
-		garden_parent.get_child(scroll_beginning_garden).pop_animation()
+		
+		var g: Garden = garden_parent.get_child(scroll_beginning_garden)
+		g.pop_animation()
 	
 	line_audio_stream_player.pitch_scale = 0.95
 	for point: Vector2 in baked_points:
@@ -211,14 +214,15 @@ func _process(_delta: float) -> void:
 
 
 func get_gardens_db_data() -> void:
-	Database.db.query("Select Grapheme, Phoneme, LessonNb, GPID FROM Lessons
+	Database.db.query("SELECT Grapheme, Phoneme, LessonNb, GPID FROM Lessons
 		INNER JOIN GPsInLessons ON GPsInLessons.LessonID = Lessons.ID
 		INNER JOIN GPs ON GPsInLessons.GPID = GPs.ID
 		ORDER BY LessonNb")
 	for e in Database.db.query_result:
 		if not lessons.has(e.LessonNb):
 			lessons[e.LessonNb] = []
-		lessons[e.LessonNb].append({grapheme = e.Grapheme, phoneme = e.Phoneme, gp_id = e.GPID})
+		var lesson_array: Array = lessons[e.LessonNb]
+		lesson_array.append({grapheme = e.Grapheme, phoneme = e.Phoneme, gp_id = e.GPID})
 
 
 func _open_minigames_layout(button: LessonButton, lesson_ind: int, garden_ind: int, button_global_position: = Vector2.ZERO) -> void:
@@ -260,12 +264,12 @@ func _open_minigames_layout(button: LessonButton, lesson_ind: int, garden_ind: i
 		minigame_background_center.modulate = garden.color
 	
 	# Lesson button
-	_handle_lesson_button(current_lesson_number, lesson_unlocks["look_and_learn"], garden.color)
+	_handle_lesson_button(current_lesson_number, lesson_unlocks["look_and_learn"] as UserProgression.Status, garden.color)
 	
 	# Minigames
-	_fill_minigame_choice(minigame_layout_1, exercises[0], lesson_unlocks["games"][0], 0)
-	_fill_minigame_choice(minigame_layout_2, exercises[1], lesson_unlocks["games"][1], 1)
-	_fill_minigame_choice(minigame_layout_3, exercises[2], lesson_unlocks["games"][2], 2)
+	_fill_minigame_choice(minigame_layout_1, exercises[0], lesson_unlocks["games"][0] as UserProgression.Status, 0)
+	_fill_minigame_choice(minigame_layout_2, exercises[1], lesson_unlocks["games"][1] as UserProgression.Status, 1)
+	_fill_minigame_choice(minigame_layout_3, exercises[2], lesson_unlocks["games"][2] as UserProgression.Status, 2)
 	
 	# Animations
 	minigame_selection.visible = true
@@ -291,8 +295,8 @@ func _open_minigames_layout(button: LessonButton, lesson_ind: int, garden_ind: i
 	minigame_layout_opened.emit()
 
 
-func _handle_lesson_button(current_lesson_number: int, status: UserProgression.Status, color: Color) -> void:
-	lesson_button.text = lessons[current_lesson_number][0].grapheme
+func _handle_lesson_button(lesson: int, status: UserProgression.Status, color: Color) -> void:
+	lesson_button.text = lessons[lesson][0].grapheme
 	lesson_button.completed_color = color
 	
 	lesson_button.disabled = status == UserProgression.Status.Locked
@@ -314,7 +318,7 @@ func _fill_minigame_choice(layout: MinigameLayout, exercise_type: int, status: U
 		if transition_data and transition_data.has("minigame_completed") and transition_data.minigame_completed and transition_data.minigame_number == minigame_number:
 			layout.self_modulate = unlocked_color
 			await minigame_layout_opened
-			var tween: = create_tween().tween_property(layout, "self_modulate:a", 0, 1)
+			create_tween().tween_property(layout, "self_modulate:a", 0, 1)
 		else:
 			layout.self_modulate.a = 0
 			
@@ -353,7 +357,9 @@ func _close_minigames_layout() -> void:
 	back_button.visible = true
 	line_particles.visible = true
 	
-	for button in garden_parent.get_child(current_garden).lesson_button_controls:
+	var garden: Garden = garden_parent.get_child(current_garden) 
+	
+	for button in garden.lesson_button_controls:
 		button.mouse_filter = Control.MOUSE_FILTER_STOP
 	
 	minigame_layout_1.pressed.disconnect(_on_minigame_button_pressed)
@@ -364,11 +370,11 @@ func _close_minigames_layout() -> void:
 func set_up_lessons() -> void:
 	var lesson_ind: = 1
 	for garden_ind in garden_parent.get_child_count():
-		var garden_control: = garden_parent.get_child(garden_ind)
+		var garden_control: Garden = garden_parent.get_child(garden_ind)
 		for i in garden_control.lesson_button_controls.size():
 			if not lesson_ind in lessons:
 				break
-			garden_control.set_lesson_label(i, lessons[lesson_ind][0].grapheme)
+			garden_control.set_lesson_label(i, lessons[lesson_ind][0].grapheme as String)
 			garden_control.lesson_button_controls[i].pressed.connect(_on_garden_lesson_button_pressed.bind(garden_control.lesson_button_controls[i], lesson_ind, garden_ind))
 			lesson_ind += 1
 
@@ -387,7 +393,7 @@ func add_gardens() -> void:
 	for child in garden_parent.get_children():
 		child.free()
 	for garden_layout in gardens_layout.gardens:
-		var garden: = garden_scene.instantiate()
+		var garden: Garden = garden_scene.instantiate()
 		garden_parent.add_child(garden)
 		garden.garden_layout = garden_layout
 
@@ -398,16 +404,16 @@ func set_up_path() -> void:
 	points = []
 	var curve: = Curve2D.new()
 	for i in gardens_layout.gardens.size():
-		var garden_layout: = gardens_layout.gardens[i]
-		var garden_control: = garden_parent.get_child(i)
-		for lesson_button in garden_layout.lesson_buttons:
-			var point_position: Vector2 = garden_parent.position + garden_control.position + Vector2(lesson_button.position)
+		var garden_layout: GardenLayout = gardens_layout.gardens[i]
+		var garden_control: Garden = garden_parent.get_child(i)
+		for b in garden_layout.lesson_buttons:
+			var point_position: Vector2 = garden_parent.position + garden_control.position + Vector2(b.position)
 			point_position += garden_control.get_button_size() / 2
 			var point_in_position: = Vector2.ZERO
 			if curve.point_count > 1:
 				point_in_position = curve.get_point_position(curve.point_count - 1) + curve.get_point_out(curve.point_count - 1) - point_position
-			curve.add_point(point_position, point_in_position, lesson_button.path_out_position)
-			points.append([point_position, point_in_position, lesson_button.path_out_position])
+			curve.add_point(point_position, point_in_position, b.path_out_position)
+			points.append([point_position, point_in_position, b.path_out_position])
 	locked_line.points = curve.get_baked_points()
 
 
@@ -419,7 +425,7 @@ func _set_progression() -> void:
 		return
 	
 	var lesson_ind: = 1
-	for garden_control in garden_parent.get_children():
+	for garden_control: Garden in garden_parent.get_children():
 		var garden_unlocks: = 0.0
 		var garden_total_unlocks: = 0.0
 		for i in garden_control.lesson_button_controls.size():
@@ -478,7 +484,7 @@ func _set_progression() -> void:
 		max_lesson += 1
 	
 	for i in range(max_lesson):
-		curve.add_point(points[i][0], points[i][1], points[i][2])
+		curve.add_point(points[i][0] as Vector2, points[i][1] as Vector2, points[i][2] as Vector2)
 	unlocked_line.points = curve.get_baked_points()
 	
 	line_particles.position = unlocked_line.points[unlocked_line.points.size()-1]
@@ -529,10 +535,11 @@ func _on_scroll_container_gui_input(event: InputEvent) -> void:
 		return
 	if event.is_action_pressed("left_click"):
 		is_scrolling = true
+		@warning_ignore("integer_division")
 		scroll_beginning_garden = scroll_container.scroll_horizontal / garden_size
-		if tween:
-			tween.stop()
-			tween = null
+		if scroll_tween:
+			scroll_tween.stop()
+			scroll_tween = null
 	elif event.is_action_released("left_click"):
 		is_scrolling = false
 		var shift_value: int = scroll_container.scroll_horizontal - scroll_beginning_garden * garden_size
@@ -546,19 +553,23 @@ func _on_scroll_container_gui_input(event: InputEvent) -> void:
 			target_scroll += garden_size
 			is_garden_changed = true
 			right_audio_stream_player.play()
-		tween = create_tween()
-		tween.set_ease(Tween.EASE_OUT)
-		tween.set_trans(Tween.TRANS_SPRING)
-		tween.tween_property(scroll_container, "scroll_horizontal", target_scroll, 1)
+		scroll_tween = create_tween()
+		scroll_tween.set_ease(Tween.EASE_OUT)
+		scroll_tween.set_trans(Tween.TRANS_SPRING)
+		scroll_tween.tween_property(scroll_container, "scroll_horizontal", target_scroll, 1)
 		if is_garden_changed:
+			@warning_ignore("integer_division")
 			var garden_ind: int = target_scroll / garden_size
-			garden_parent.get_child(garden_ind).pop_animation()
+			var garden: Garden = garden_parent.get_child(garden_ind)
+			garden.pop_animation()
 		
-		await tween.finished
+		await scroll_tween.finished
+		@warning_ignore("integer_division")
 		scroll_beginning_garden = scroll_container.scroll_horizontal / garden_size
 		
 	if is_scrolling and event is InputEventMouseMotion:
-		scroll_container.scroll_horizontal -= event.relative.x
+		var motion_event: InputEventMouseMotion = event
+		scroll_container.scroll_horizontal -= int(motion_event.relative.x)
 
 
 func _on_back_button_pressed() -> void:
@@ -566,6 +577,6 @@ func _on_back_button_pressed() -> void:
 	get_tree().change_scene_to_file("res://sources/menus/brain/brain.tscn")
 
 
-func _on_area_2d_input_event(viewport, event, shape_idx):
+func _on_area_2d_input_event(_viewport: Node, event: InputEvent, _shape_idx: int) -> void:
 	if event.is_action_pressed("left_click") and in_minigame_selection:
 		_close_minigames_layout()
diff --git a/sources/gardens/minigame_layout.gd b/sources/gardens/minigame_layout.gd
index 7635ba94..86f95003 100644
--- a/sources/gardens/minigame_layout.gd
+++ b/sources/gardens/minigame_layout.gd
@@ -6,9 +6,9 @@ signal pressed()
 
 var is_disabled: bool = false
 
-func _ready():
+func _ready() -> void:
 	area.connect("input_event", _on_click)
 
-func _on_click(viewport, event, shape_idx):
+func _on_click(_viewport: Node, event: InputEvent, _shape_idx: int) -> void:
 	if event.is_action_pressed("left_click") and not is_disabled:
 		pressed.emit()
diff --git a/sources/lesson_screen/lesson_button.gd b/sources/lesson_screen/lesson_button.gd
index c6b99b2e..c6b68af7 100644
--- a/sources/lesson_screen/lesson_button.gd
+++ b/sources/lesson_screen/lesson_button.gd
@@ -14,7 +14,7 @@ extends TextureButton
 @onready var placeholder: TextureRect = %Placeholder
 @onready var right_fx: RightFX = %RightFX
 
-func _ready():
+func _ready() -> void:
 	_set_base_color(base_color)
 	_set_completed_color(completed_color)
 	_set_text(text)
diff --git a/sources/look_and_learn/letter_segment.gd b/sources/look_and_learn/letter_segment.gd
index 5fd29c50..c2fcbf23 100644
--- a/sources/look_and_learn/letter_segment.gd
+++ b/sources/look_and_learn/letter_segment.gd
@@ -3,10 +3,13 @@ class_name LetterSegment
 
 signal finished()
 
-@onready var tracing_path: = $TracingPath
-@onready var tracing_effects: = $TracingEffects
-@onready var complete_particles: = $CompleteParticles
-@onready var complete_sound: = $CompleteAudioStreamPlayer
+const TracingPath: = preload("res://sources/look_and_learn/tracing_path.gd")
+const TracingEffects: = preload("res://sources/look_and_learn/tracing_effects.gd")
+
+@onready var tracing_path: TracingPath = $TracingPath
+@onready var tracing_effects: TracingEffects = $TracingEffects
+@onready var complete_particles: GPUParticles2D = $CompleteParticles
+@onready var complete_sound: AudioStreamPlayer = $CompleteAudioStreamPlayer
 
 
 func _ready() -> void:
diff --git a/sources/look_and_learn/look_and_learn.gd b/sources/look_and_learn/look_and_learn.gd
index 376bcd38..b9976821 100644
--- a/sources/look_and_learn/look_and_learn.gd
+++ b/sources/look_and_learn/look_and_learn.gd
@@ -1,17 +1,20 @@
 extends Control
 
+const Gardens: = preload("res://sources/gardens/gardens.gd")
+const TracingManager: = preload("res://sources/look_and_learn/tracing_manager.gd")
+
 @export var lesson_nb: = 1
 @export var current_button_pressed: = 0
 
-@onready var animation_player: = $AnimationPlayer
-@onready var audio_player: = $AudioStreamPlayer
-@onready var video_player: = %VideoStreamPlayer
-@onready var image: = %Image
-@onready var grapheme_label: = %GraphemeLabel
-@onready var tracing_manager: = %TracingManager
-@onready var grapheme_particles: = $GraphemeParticles
+@onready var animation_player: AnimationPlayer = $AnimationPlayer
+@onready var audio_player: AudioStreamPlayer = $AudioStreamPlayer
+@onready var video_player: VideoStreamPlayer = %VideoStreamPlayer
+@onready var image: TextureRect = %Image
+@onready var grapheme_label: Label = %GraphemeLabel
+@onready var tracing_manager: TracingManager = %TracingManager
+@onready var grapheme_particles: GPUParticles2D = $GraphemeParticles
+
 
-const Gardens: = preload("res://sources/gardens/gardens.gd")
 
 var gp_list: Array[Dictionary]
 
@@ -67,7 +70,7 @@ func setup() -> void:
 		gp_display.append(gp_list[0])
 	
 	grapheme_label.text = ""
-	for gp in gp_display:
+	for gp: Dictionary in gp_display:
 		grapheme_label.text += "%s" % gp.Grapheme
 
 
@@ -93,7 +96,7 @@ func play_images_and_sounds()  -> void:
 
 
 func load_tracing() -> void:
-	await tracing_manager.setup(gp_list[current_tracing]["Grapheme"])
+	await tracing_manager.setup(gp_list[current_tracing]["Grapheme"] as String)
 	current_tracing += 1
 
 
@@ -135,7 +138,7 @@ func _on_audio_stream_player_finished() -> void:
 
 func _on_tracing_manager_finished() -> void:
 	if current_tracing < gp_list.size():
-		await tracing_manager.setup(gp_list[current_tracing]["Grapheme"])
+		await tracing_manager.setup(gp_list[current_tracing]["Grapheme"] as String)
 		tracing_manager.start()
 		current_tracing += 1
 	else:
diff --git a/sources/look_and_learn/look_and_learn.tscn b/sources/look_and_learn/look_and_learn.tscn
index 4122438c..5691aae4 100644
--- a/sources/look_and_learn/look_and_learn.tscn
+++ b/sources/look_and_learn/look_and_learn.tscn
@@ -970,7 +970,6 @@ process_material = SubResource("ParticleProcessMaterial_vgnm5")
 texture = ExtResource("13_rp6w3")
 lifetime = 0.5
 
-[connection signal="animation_finished" from="AnimationPlayer" to="." method="_on_animation_player_animation_finished"]
 [connection signal="finished" from="AudioStreamPlayer" to="." method="_on_audio_stream_player_finished"]
 [connection signal="pressed" from="LeftContainer/MarginContainer/GardenButton" to="." method="_on_garden_button_pressed"]
 [connection signal="finished" from="Frame/Mask/ColorRect/TracingManager" to="." method="_on_tracing_manager_finished"]
diff --git a/sources/look_and_learn/tracing_effects.gd b/sources/look_and_learn/tracing_effects.gd
index bea04ace..0b0ce622 100644
--- a/sources/look_and_learn/tracing_effects.gd
+++ b/sources/look_and_learn/tracing_effects.gd
@@ -1,8 +1,8 @@
 extends Node2D
 
-@onready var particles_effect: = $TracingParticles
-@onready var sound_effect: = $TracingAudioStreamPlayer
-@onready var timer: = $Timer
+@onready var particles_effect: GPUParticles2D = $TracingParticles
+@onready var sound_effect: AudioStreamPlayer = $TracingAudioStreamPlayer
+@onready var timer: Timer = $Timer
 
 
 func _ready() -> void:
diff --git a/sources/look_and_learn/tracing_manager.gd b/sources/look_and_learn/tracing_manager.gd
index f404041e..74eb5b53 100644
--- a/sources/look_and_learn/tracing_manager.gd
+++ b/sources/look_and_learn/tracing_manager.gd
@@ -6,8 +6,8 @@ const letter_segment_class: = preload("res://sources/look_and_learn/letter_segme
 
 @export var label_settings: LabelSettings
 
-@onready var lower_labels: = %LowerLabels
-@onready var upper_labels: = %UpperLabels
+@onready var lower_labels: HBoxContainer = %LowerLabels
+@onready var upper_labels: HBoxContainer = %UpperLabels
 
 const tracing_data_folder: = "tracing_data/"
 const extension: = ".csv"
@@ -18,8 +18,8 @@ func _process(_delta: float) -> void:
 
 
 func place_segments(labels: Array) -> void:
-	for label in labels:
-		for segment in label.get_children():
+	for label: Label in labels:
+		for segment: LetterSegment in label.get_children():
 			segment.global_position = label.global_position + label.size / 2.0  + Vector2(0.0, 72.0)
 
 
@@ -42,10 +42,10 @@ func setup(grapheme: String) -> void:
 		var tracings: = _get_letter_tracings(letter)
 		
 		if tracings.lower:
-			setup_tracing(letter, tracings["lower"], lower_labels, true)
+			setup_tracing(letter, tracings["lower"] as Array, lower_labels, true)
 		
 		if tracings.upper:
-			setup_tracing(letter, tracings["upper"], upper_labels, false)
+			setup_tracing(letter, tracings["upper"] as Array, upper_labels, false)
 
 
 func setup_tracing(letter: String, letter_tracings: Array, parent: Control, lower: bool) -> void:
@@ -126,12 +126,12 @@ func start() -> void:
 		await demo_labels(upper_labels)
 		await start_labels(upper_labels)
 	
-	emit_signal("finished")
+	finished.emit()
 
 
 func start_labels(labels_parent: Control) -> void:
 	for letter in labels_parent.get_children():
-		for segment in letter.get_children():
+		for segment: LetterSegment in letter.get_children():
 			segment.start()
 			await segment.finished
 			letter.move_child(segment, 0)
@@ -139,6 +139,6 @@ func start_labels(labels_parent: Control) -> void:
 
 func demo_labels(labels_parent: Control) -> void:
 	for letter in labels_parent.get_children():
-		for segment in letter.get_children():
+		for segment: LetterSegment in letter.get_children():
 			segment.demo()
 			await segment.finished
diff --git a/sources/look_and_learn/tracing_path.gd b/sources/look_and_learn/tracing_path.gd
index 7aa46c8a..497493ff 100644
--- a/sources/look_and_learn/tracing_path.gd
+++ b/sources/look_and_learn/tracing_path.gd
@@ -10,11 +10,11 @@ signal demo_finished
 
 @export var color_gradient: Gradient
 
-@onready var line: = $Line2D
-@onready var guide: = $GuidePathFollow
-@onready var hand: = $HandPathFollow2D
-@onready var guide_sprite: = $GuidePathFollow/Guide
-@onready var hand_sprite: = $HandPathFollow2D/Hand
+@onready var line: Line2D = $Line2D
+@onready var guide: PathFollow2D = $GuidePathFollow
+@onready var hand: PathFollow2D = $HandPathFollow2D
+@onready var guide_sprite: Sprite2D = $GuidePathFollow/Guide
+@onready var hand_sprite: Sprite2D = $HandPathFollow2D/Hand
 
 var curve_points: PackedVector2Array
 @onready var remaining_curve: = Curve2D.new()
@@ -30,7 +30,7 @@ func _ready() -> void:
 	hand_sprite.visible = false
 
 
-func _exit_tree():
+func _exit_tree() -> void:
 	pass
 	#if is_instance_valid(remaining_curve):
 		#remaining_curve.free()
@@ -66,7 +66,7 @@ func _tracing_process() -> void:
 	while touch_positions.size() > 0:
 		var touch_position: Vector2 = touch_positions.pop_front()
 		var touch_vector: Vector2 = touch_position - guide.global_position
-		var current_offset = 0.0
+		var current_offset: = 0.0
 		if touch_vector.length() < distance:
 			var target_offset: float = remaining_curve.get_closest_offset(touch_position - global_position)
 			if target_offset > current_offset and target_offset - current_offset <= distance:
@@ -76,11 +76,11 @@ func _tracing_process() -> void:
 				should_play_effects = true
 				var remove_up_to: = 0
 				for i in curve_points.size():
-					var offset = curve.get_closest_offset(curve_points[i])
+					var offset: = curve.get_closest_offset(curve_points[i])
 					if offset > guide.progress:
 						remove_up_to = i
 						break
-				for i in int(min(remove_up_to, curve_points.size() - 2)):
+				for i: int in min(remove_up_to, curve_points.size() - 2):
 					curve_points.remove_at(0)
 					remaining_curve.remove_point(0)
 
@@ -106,7 +106,7 @@ func setup(points: Array) -> void:
 	line.width = 50.0
 	
 	var smooth_points: = _smooth_points(points)
-	for point in smooth_points:
+	for point: Vector2 in smooth_points:
 		curve.add_point(point)
 	
 	guide.progress = 0.0
@@ -120,12 +120,12 @@ func setup(points: Array) -> void:
 
 
 func _smooth_points(points: Array) -> Array:
-	return Bezier.bezier_sampling(points, max(points_per_curve, points.size()))
+	return Bezier.bezier_sampling(points, max(points_per_curve, points.size()) as int)
 
 
 func set_points(points: Array) -> void:
 	curve.clear_points()
-	for point in points:
+	for point: Vector2 in points:
 		curve.add_point(point)
 
 
diff --git a/sources/menus/language_selection/package_downloader.gd b/sources/menus/language_selection/package_downloader.gd
index 42e38edb..52e72d1d 100644
--- a/sources/menus/language_selection/package_downloader.gd
+++ b/sources/menus/language_selection/package_downloader.gd
@@ -31,9 +31,9 @@ func _ready() -> void:
 	var current_version: Dictionary = UserDataManager.get_device_settings().language_versions.get(device_language, {})
 	
 	# Gets the info of the language pack on the server
-	var res = await ServerManager.get_language_pack_url(device_language)
+	var res: = await ServerManager.get_language_pack_url(device_language)
 	if res.code == 200:
-		server_version = Time.get_datetime_dict_from_datetime_string(res.body.last_modified, false)
+		server_version = Time.get_datetime_dict_from_datetime_string(res.body.last_modified as String, false)
 	else:
 		# Offline mode, if a pack is already downloaded, go to next scene
 		if DirAccess.dir_exists_absolute(current_language_path):
@@ -62,18 +62,20 @@ func _ready() -> void:
 		
 		# Download the pack
 		http_request.set_download_file(user_language_resources_path.path_join(device_language + ".zip"))
-		http_request.request(res.body.url)
+		http_request.request(res.body.url as String)
 	else:
 		download_bar.value = 1
 		extract_bar.value = 1
 		_go_to_main_menu()
 
 
-func _process(delta):
+func _process(_delta: float) -> void:
 	if http_request.get_body_size() > 0:
-		var max = int(http_request.get_body_size()/1024)
-		var current = int(http_request.get_downloaded_bytes()/1024)
-		download_bar.max_value = max
+		@warning_ignore("integer_division")
+		var maximum: = int(http_request.get_body_size()/1024)
+		@warning_ignore("integer_division")
+		var current: = int(http_request.get_downloaded_bytes()/1024)
+		download_bar.max_value = maximum
 		download_bar.value = current
 		download_info.text = str(current) + "KB/" + str(max) + "KB"
 
@@ -128,7 +130,7 @@ func _go_to_main_menu() -> void:
 
 
 func _delete_dir(path: String) -> void:
-	var dir = DirAccess.open(path)
+	var dir: = DirAccess.open(path)
 	for file in dir.get_files():
 		dir.remove(file)
 	for subfolder in dir.get_directories():
@@ -136,7 +138,7 @@ func _delete_dir(path: String) -> void:
 		dir.remove(subfolder)
 
 
-func _on_http_request_request_completed(result, response_code, headers, body):
+func _on_http_request_request_completed(_result: int, response_code: int, _headers: PackedStringArray, _body: PackedByteArray) -> void:
 	if response_code == 200:
 		mutex = Mutex.new()
 		thread = Thread.new()
diff --git a/sources/menus/main/kalulu.gd b/sources/menus/main/kalulu.gd
index 9a1c0d2d..2062b211 100644
--- a/sources/menus/main/kalulu.gd
+++ b/sources/menus/main/kalulu.gd
@@ -1,7 +1,7 @@
 extends Control
 
 @onready var speech_player : AudioStreamPlayer = $SpeechPlayer
-@onready var sprite: = $Sprite
+@onready var sprite: AnimatedSprite2D = $Sprite
 
 var tuto_speech :AudioStreamMP3
 var feedback_speech :AudioStreamMP3
@@ -17,13 +17,13 @@ var isSpeaking : bool = false :
 var elapsedTime : float = 0.0
 
 
-func _ready():
+func _ready() -> void:
 	tuto_speech = Database.load_external_sound(Database.get_kalulu_speech_path("title_screen", "tuto_welcome_oneshot"))
 	feedback_speech = Database.load_external_sound(Database.get_kalulu_speech_path("title_screen", "feedback_welcome"))
 	_play_speech(tuto_speech)
 
 
-func _process(delta):
+func _process(delta: float) -> void:
 	if not visible:
 		return
 	
@@ -35,7 +35,7 @@ func _process(delta):
 	if elapsedTime > 20:
 		start_speech()
 
-func _play_speech(speech : AudioStream):
+func _play_speech(speech : AudioStream) -> void:
 	if not speech:
 		push_warning("Speech not found")
 		isSpeaking = false
@@ -50,11 +50,11 @@ func _play_speech(speech : AudioStream):
 	isSpeaking = false
 
 
-func start_speech():
+func start_speech() -> void:
 	_play_speech(feedback_speech)
 
 
-func stop_speech():
+func stop_speech() -> void:
 	sprite.stop()
 	speech_player.stop()
 	isSpeaking = false
diff --git a/sources/menus/main/language_field.gd b/sources/menus/main/language_field.gd
index df601d71..13e992f5 100644
--- a/sources/menus/main/language_field.gd
+++ b/sources/menus/main/language_field.gd
@@ -2,7 +2,7 @@ extends OptionButton
 
 var items : Array[String]
 
-func _ready():
+func _ready() -> void:
 	# Adds the supported locales to the field
 	var idx: int = 0
 	for language_locale in DeviceSettings.supported_locales:
@@ -22,9 +22,9 @@ func _ready():
 
 
 func get_selected_language() -> String:
-	var id = get_selected_id()
+	var id: = get_selected_id()
 	return items[id]
 
 
-func _on_item_selected(index: int):
+func _on_item_selected(index: int) -> void:
 	UserDataManager.set_language(items[index])
diff --git a/sources/menus/main/login.gd b/sources/menus/main/login.gd
index 42d34a52..2d826a8b 100644
--- a/sources/menus/main/login.gd
+++ b/sources/menus/main/login.gd
@@ -13,13 +13,13 @@ signal logged_in
 
 var account_type: TeacherSettings.AccountType
 
-func _ready():
+func _ready() -> void:
 	email_field.text_changed.connect(_hide_login_error)
 	password_field.text_changed.connect(_hide_login_error)
 	device_id_field.value_changed.connect(_hide_login_error)
 
 
-func show_form(is_teacher : bool):
+func show_form(is_teacher : bool) -> void:
 	self.show()
 	
 	if is_teacher:
@@ -35,13 +35,13 @@ func show_form(is_teacher : bool):
 		parent_label.show()
 
 
-func _hide_login_error(_value):
+func _hide_login_error(_value: Variant) -> void:
 	if login_message.visible:
 		login_message.hide()
 
 
-func _on_login_form_validator_control_validated(control, passed, messages):
-	var label = find_child(control.name + "Error", true, false) as Label
+func _on_login_form_validator_control_validated(control: Control, passed: Variant, messages: PackedStringArray) -> void:
+	var label: = find_child(control.name + "Error", true, false) as Label
 	if not label:
 		return
 	if passed:
@@ -57,10 +57,10 @@ func _on_validate_button_pressed() -> void:
 		return
 	
 	# Request server for login
-	var res = await ServerManager.login(account_type, int(device_id_field.value), email_field.text, password_field.text)
+	var res: = await ServerManager.login(account_type, int(device_id_field.value), email_field.text, password_field.text)
 	if res.code == 200:
 		# Login
-		if UserDataManager.login(res.body):
+		if UserDataManager.login(res.body as Dictionary):
 			logged_in.emit()
 		else:
 			login_message.visible = true
diff --git a/sources/menus/main/main_menu.gd b/sources/menus/main/main_menu.gd
index f70e3972..738c48dc 100644
--- a/sources/menus/main/main_menu.gd
+++ b/sources/menus/main/main_menu.gd
@@ -1,5 +1,8 @@
 extends Control
 
+const Kalulu: = preload("res://sources/menus/main/kalulu.gd")
+const LoginForm: = preload("res://sources/menus/main/login.gd")
+
 const adult_check_scene_path := "res://sources/menus/adult_check/adult_check.tscn"
 const package_loader_scene_path: = "res://sources/menus/language_selection/package_downloader.tscn"
 
@@ -7,21 +10,21 @@ const package_loader_scene_path: = "res://sources/menus/language_selection/packa
 @onready var teacher_label : Label = $Informations/TeacherValue
 @onready var device_id_label : Label = $Informations/DeviceIDValue
 
-@onready var kalulu : Control = $Kalulu
+@onready var kalulu : Kalulu = $Kalulu
 @onready var user_selection : Control = $UserSelection
-@onready var login_form : Control = %LoginForm
+@onready var login_form : LoginForm = %LoginForm
 @onready var interface_left : MarginContainer = %InterfaceLeft
 @onready var keyboard_spacer: KeyboardSpacer = %KeyboardSpacer
 
 
-func _ready():
+func _ready() -> void:
 	version_label.text = ProjectSettings.get_setting("application/config/version")
 	teacher_label.text = UserDataManager.get_device_settings().teacher
 	device_id_label.text = str(UserDataManager.get_device_settings().device_id)
 	OpeningCurtain.open()
 
 
-func _on_main_button_pressed():
+func _on_main_button_pressed() -> void:
 	if UserDataManager.get_device_settings().teacher:
 		_on_login_in()
 	else:
@@ -31,31 +34,31 @@ func _on_main_button_pressed():
 		interface_left.show()
 
 
-func _on_back_button_pressed():
+func _on_back_button_pressed() -> void:
 	keyboard_spacer.hide()
 	user_selection.hide()
 	kalulu.show()
 	interface_left.hide()
 
 
-func _on_sign_in_teacher_pressed():
+func _on_sign_in_teacher_pressed() -> void:
 	user_selection.hide()
 	kalulu.hide()
 	keyboard_spacer.show()
 	login_form.show_form(true)
 
 
-func _on_sign_in_parent_pressed():
+func _on_sign_in_parent_pressed() -> void:
 	user_selection.hide()
 	kalulu.hide()
 	keyboard_spacer.show()
 	login_form.show_form(false)
 
 
-func _on_register_pressed():
+func _on_register_pressed() -> void:
 	await OpeningCurtain.close()
 	get_tree().change_scene_to_file(adult_check_scene_path)
 
 
-func _on_login_in():
+func _on_login_in() -> void:
 	get_tree().change_scene_to_file(package_loader_scene_path)
diff --git a/sources/menus/splash_screen/splash_screen.gd b/sources/menus/splash_screen/splash_screen.gd
index b930d40a..28c033d9 100644
--- a/sources/menus/splash_screen/splash_screen.gd
+++ b/sources/menus/splash_screen/splash_screen.gd
@@ -7,10 +7,10 @@ func _go_to_main_menu() -> void:
 	get_tree().change_scene_to_file(main_menu_scene_path)
 
 
-func _on_timer_timeout():
+func _on_timer_timeout() -> void:
 	_go_to_main_menu()
 
 
-func _on_gui_input(event):
+func _on_gui_input(event: InputEvent) -> void:
 	if event.is_action_pressed("left_click"):
 		_go_to_main_menu()
diff --git a/sources/minigames/base/MinigameAudioStreamPlayer.gd b/sources/minigames/base/MinigameAudioStreamPlayer.gd
index 76eaebf9..c9e90c3a 100644
--- a/sources/minigames/base/MinigameAudioStreamPlayer.gd
+++ b/sources/minigames/base/MinigameAudioStreamPlayer.gd
@@ -5,7 +5,7 @@ func play_gp(gp: Dictionary) -> void:
 	if not gp or gp.is_empty():
 		return
 	
-	var phoneme_audiostream = Database.load_external_sound(Database.get_gp_sound_path(gp)) as AudioStream
+	var phoneme_audiostream: = Database.load_external_sound(Database.get_gp_sound_path(gp)) as AudioStream
 	#var phoneme_audiostream = Database.get_gp_look_and_learn_sound(phoneme)
 	if not phoneme_audiostream:
 		push_warning("AudioStream not found for gp %s " % gp)
diff --git a/sources/minigames/base/base_minigame.gd b/sources/minigames/base/base_minigame.gd
index 506ea5e5..8bc48931 100644
--- a/sources/minigames/base/base_minigame.gd
+++ b/sources/minigames/base/base_minigame.gd
@@ -3,6 +3,7 @@ extends Control
 class_name Minigame
 
 const Gardens: = preload("res://sources/gardens/gardens.gd")
+const Fireworks: = preload("res://sources/utils/fx/fireworks.gd")
 
 enum Type {
 	jellyfish,
@@ -42,9 +43,9 @@ enum Type {
 @export var errors_before_help_speech: int = 2
 @export var errors_before_highlight: int = 3
 
-@onready var minigame_ui: = $MinigameUI
+@onready var minigame_ui: MinigameUI = $MinigameUI
 @onready var audio_player: MinigameAudioStreamPlayer = $AudioStreamPlayer
-@onready var fireworks: = $Fireworks
+@onready var fireworks: Fireworks = $Fireworks
 
 # Game root shall contain all the game tree.
 # This node is pausable unlike the others, so the pause button can stop the game but not other essential processes.
@@ -123,11 +124,11 @@ func _ready() -> void:
 	
 	# Difficulty
 	if UserDataManager._student_difficulty:
-		difficulty = UserDataManager.get_difficulty_for_minigame(Type.keys()[minigame_name])
+		difficulty = UserDataManager.get_difficulty_for_minigame(Type.keys()[minigame_name] as String)
 	
-	intro_kalulu_speech = Database.load_external_sound(Database.get_kalulu_speech_path(Type.keys()[minigame_name], "intro"))
-	help_kalulu_speech = Database.load_external_sound(Database.get_kalulu_speech_path(Type.keys()[minigame_name], "help"))
-	win_kalulu_speech = Database.load_external_sound(Database.get_kalulu_speech_path(Type.keys()[minigame_name], "end"))
+	intro_kalulu_speech = Database.load_external_sound(Database.get_kalulu_speech_path(Type.keys()[minigame_name] as String, "intro"))
+	help_kalulu_speech = Database.load_external_sound(Database.get_kalulu_speech_path(Type.keys()[minigame_name] as String, "help"))
+	win_kalulu_speech = Database.load_external_sound(Database.get_kalulu_speech_path(Type.keys()[minigame_name] as String, "end"))
 	lose_kalulu_speech = Database.load_external_sound(Database.get_kalulu_speech_path("minigame", "lose"))
 	
 	if not Engine.is_editor_hint():
@@ -199,7 +200,7 @@ func _win() -> void:
 		UserDataManager.update_remediation_scores(scores)
 	
 	# Difficulty
-	UserDataManager.update_difficulty_for_minigame(Type.keys()[minigame_name], true)
+	UserDataManager.update_difficulty_for_minigame(Type.keys()[minigame_name] as String, true)
 	
 	audio_player.stream = win_sound_fx
 	audio_player.play()
@@ -225,7 +226,7 @@ func _lose() -> void:
 		UserDataManager.update_remediation_scores(scores)
 	
 	# Difficulty
-	UserDataManager.update_difficulty_for_minigame(Type.keys()[minigame_name], false)
+	UserDataManager.update_difficulty_for_minigame(Type.keys()[minigame_name] as String, false)
 	
 	audio_player.stream = lose_sound_fx
 	audio_player.play()
@@ -241,7 +242,7 @@ func _lose() -> void:
 #region Logs
 
 func _save_logs() -> void:
-	LessonLogger.save_logs(logs, UserDataManager.get_student_folder(), Type.keys()[minigame_name], lesson_nb, Time.get_time_string_from_system())
+	LessonLogger.save_logs(logs, UserDataManager.get_student_folder(), Type.keys()[minigame_name] as String, lesson_nb, Time.get_time_string_from_system())
 	_reset_logs()
 
 
@@ -264,7 +265,8 @@ func _log_new_response(response: Dictionary, current_stimulus: Dictionary) -> vo
 		"max_number_of_lives": max_number_of_lives,
 	}
 	
-	logs["answers"].append(response_log)
+	var answers: Array = logs["answers"]
+	answers.append(response_log)
 
 #endregion
 
@@ -275,7 +277,7 @@ func _get_stimulus_score(stimulus: Dictionary) -> int:
 	var score: int = 0
 	if stimulus.has("GPs"):
 		for gp: Dictionary in stimulus.GPs:
-			score += UserDataManager.get_GP_remediation_score(gp.ID)
+			score += UserDataManager.get_GP_remediation_score(gp.ID as int)
 	return score
 
 
diff --git a/sources/minigames/base/kalulu.gd b/sources/minigames/base/kalulu.gd
index 535815e8..09fedde2 100644
--- a/sources/minigames/base/kalulu.gd
+++ b/sources/minigames/base/kalulu.gd
@@ -6,8 +6,8 @@ const show_sound := preload("res://assets/kalulu/audio/ui_button_on.mp3")
 const hide_sound := preload("res://assets/kalulu/audio/ui_button_off.mp3")
 
 
-@onready var kalulu_sprite: = $KaluluSprite
-@onready var audio_player: = $AudioStreamPlayer
+@onready var kalulu_sprite: AnimatedSprite2D = $KaluluSprite
+@onready var audio_player: AudioStreamPlayer = $AudioStreamPlayer
 
 
 func _ready() -> void:
diff --git a/sources/minigames/base/minigame_ui.gd b/sources/minigames/base/minigame_ui.gd
index 38c41c1e..46a29b99 100644
--- a/sources/minigames/base/minigame_ui.gd
+++ b/sources/minigames/base/minigame_ui.gd
@@ -12,6 +12,7 @@ signal kalulu_speech_ended
 
 signal pause_ended
 
+const Kalulu: = preload("res://sources/minigames/base/kalulu.gd")
 const empty_lives_icon: = preload("res://assets/minigames/minigame_ui/graphic/life_empty.png")
 const full_lives_icon: = preload("res://assets/minigames/minigame_ui/graphic/life.png")
 
@@ -41,15 +42,15 @@ const full_lives_icon: = preload("res://assets/minigames/minigame_ui/graphic/lif
 @onready var center_menu: MarginContainer = %CenterMenu
 
 # Kalulu
-@onready var kalulu: Control = %Kalulu
+@onready var kalulu: Kalulu = %Kalulu
 
-@onready var progression_container: = %ProgressionContainer
-@onready var progression_gauge: = %ProgressionGauge
-@onready var model_progression_rect: = %ProgressionIconsRect
-@onready var lives_container: = %LivesContainer
-@onready var model_lives_rect: = %LivesIconsRect
+@onready var progression_container: VBoxContainer = %ProgressionContainer
+@onready var progression_gauge: NinePatchRect = %ProgressionGauge
+@onready var model_progression_rect: TextureRect = %ProgressionIconsRect
+@onready var lives_container: HBoxContainer = %LivesContainer
+@onready var model_lives_rect: TextureRect = %LivesIconsRect
 
-@onready var animation_player: = $AnimationPlayer
+@onready var animation_player: AnimationPlayer = $AnimationPlayer
 
 var is_paused: bool = false
 
@@ -93,7 +94,7 @@ func set_maximum_number_of_lives(new_max_number_of_lives: int) -> void:
 		if i >= new_max_number_of_lives:
 			lives_rects[i].queue_free()
 	for i in range(lives_rects.size(), new_max_number_of_lives):
-		var new_lives_rect: = model_lives_rect.duplicate()
+		var new_lives_rect: TextureRect = model_lives_rect.duplicate()
 		new_lives_rect.texture = full_lives_icon
 		lives_container.add_child(new_lives_rect)
 	model_lives_rect.visible = new_max_number_of_lives >= 1
@@ -107,10 +108,11 @@ func set_number_of_lives(new_number_of_lives: int) -> void:
 		set_maximum_number_of_lives(new_number_of_lives)
 	var lives_rects: = lives_container.get_children()
 	for i in max_lives:
+		var life_rect: TextureRect = lives_rects[i]
 		if i < max_lives - new_number_of_lives:
-			lives_rects[i].texture = empty_lives_icon
+			life_rect.texture = empty_lives_icon
 		else:
-			lives_rects[i].texture = full_lives_icon
+			life_rect.texture = full_lives_icon
 
 #endregion
 
@@ -125,7 +127,7 @@ func set_max_progression(new_max_progression: int) -> void:
 		if i >= new_max_progression:
 			progression_rects[i].queue_free()
 	for i in range(progression_rects.size(), new_max_progression):
-		var new_progression_rect: = model_progression_rect.duplicate()
+		var new_progression_rect: TextureRect = model_progression_rect.duplicate()
 		new_progression_rect.show()
 		new_progression_rect.texture = empty_progression_icon
 		progression_container.add_child(new_progression_rect)
@@ -140,10 +142,11 @@ func set_progression(new_progression: int) -> void:
 		set_max_progression(new_progression)
 	var progression_rects: = progression_container.get_children()
 	for i in max_progression:
+		var progression_rect: TextureRect = progression_rects[i]
 		if i < new_progression:
-			progression_rects[i].texture = full_progression_icon
+			progression_rect.texture = full_progression_icon
 		else:
-			progression_rects[i].texture = empty_progression_icon
+			progression_rect.texture = empty_progression_icon
 
 #endregion
 
diff --git a/sources/utils/autoloads/Database.gd b/sources/utils/autoloads/Database.gd
index 3432bbc3..82ebce28 100644
--- a/sources/utils/autoloads/Database.gd
+++ b/sources/utils/autoloads/Database.gd
@@ -138,9 +138,10 @@ func get_GP_for_lesson(lesson_nb: int, distinct: bool, only_new: bool = false, o
 	var result: = db.query_result
 	
 	if with_other_phonemes:
-		for GP in result:
+		for GP: Dictionary in result:
 			if GP.OtherPhonemes:
-				GP.OtherPhonemes = GP.OtherPhonemes.split(",")
+				var phonemes: String = GP.OtherPhonemes
+				GP.OtherPhonemes = phonemes.split(",")
 	
 	return result
 
@@ -193,7 +194,7 @@ func get_syllables_for_lesson(lesson_nb: int, only_new: = false) -> Array[Dictio
 	
 	var res : = db.query_result
 	for syllable: Dictionary in res:
-		syllable.GPs = get_GPs_from_syllable(syllable.ID)
+		syllable.GPs = get_GPs_from_syllable(syllable.ID as int)
 		var phonemes: Array[String] = []
 		for GP: Dictionary in syllable.GPs:
 			phonemes.append(GP.Phoneme)
@@ -235,9 +236,11 @@ FROM Words
 	
 	# Parse the GPs IDs
 	for word: Dictionary in res:
-		word.GPs = []
-		for GPID in word.GPs_IDs.split(","):
-			word.GPs.append({ID = int(GPID)})
+		var word_GPs: = []
+		var word_gps_id: String = word.GPs_IDs
+		for GPID: String in word_gps_id.split(","):
+			word_GPs.append({ID = int(GPID)})
+		word.GPs = word_GPs
 		word.erase("GPs_IDs")
 	
 	return res
@@ -284,8 +287,8 @@ func get_sentences_by_lessons() -> Dictionary:
 	var sentences: = db.query_result
 	
 	for sentence in sentences:
-		var lesson_nb: = get_min_lesson_for_sentence_id(sentence.ID)
-		var a = sentences_by_lesson.get(lesson_nb, [])
+		var lesson_nb: = get_min_lesson_for_sentence_id(sentence.ID as int)
+		var a: Array = sentences_by_lesson.get(lesson_nb, [])
 		a.append(sentence)
 		sentences_by_lesson[lesson_nb] = a
 	return sentences_by_lesson
@@ -300,7 +303,7 @@ func get_sentences(p_lesson_nb: int, only_new: = false, sentences_by_lesson: = {
 	
 	var ret: Array = []
 	for i in p_lesson_nb:
-		ret.append_array(sentences_by_lesson.get(i, []))
+		ret.append_array(sentences_by_lesson.get(i, []) as Array)
 	return ret
 
 
@@ -417,7 +420,7 @@ func get_min_lesson_for_word_id(word_id: int) -> int:
 	ORDER BY Position", [word_id])
 	var m: = -1
 	for result in db.query_result:
-		var i: = Database.get_min_lesson_for_gp_id(result.GPID)
+		var i: = Database.get_min_lesson_for_gp_id(result.GPID as int)
 		if i < 0:
 			m = -1
 			break
@@ -459,10 +462,10 @@ func get_audio_stream_for_path(path: String) -> AudioStream:
 
 func get_audio_stream_for_word(ID: int) -> AudioStream:
 	var GPs: = get_GP_from_word(ID)
-	var file_name: = _phoneme_to_string(GPs[0].Phoneme)
+	var file_name: = _phoneme_to_string(GPs[0].Phoneme as String)
 	for i in range(1, GPs.size()):
-		var GP = GPs[i]
-		file_name += "-" + _phoneme_to_string(GP.Phoneme)
+		var GP: Dictionary = GPs[i]
+		file_name += "-" + _phoneme_to_string(GP.Phoneme as String)
 	file_name += ".mp3"
 	return load(words_path + file_name)
 
@@ -498,8 +501,8 @@ func get_gp_look_and_learn_sound(gp: Dictionary) -> AudioStream:
 		if ResourceLoader.exists(path):
 			return load(path)
 		else:
-			var file = FileAccess.open(path, FileAccess.READ)
-			var sound = AudioStreamMP3.new()
+			var file: = FileAccess.open(path, FileAccess.READ)
+			var sound: = AudioStreamMP3.new()
 			sound.data = file.get_buffer(file.get_length())
 			return sound
 	
@@ -564,192 +567,6 @@ func _phoneme_to_string(phoneme: String) -> String:
 		return "cap." + phoneme.to_lower()
 
 
-# Import data from previous Kalulu version
-
-func _import_gps() -> void:
-	var file = FileAccess.open("res://data3/gp_list.json", FileAccess.READ)
-	var dict = JSON.parse_string(file.get_line())
-	for e in dict.values():
-		var g = e.GRAPHEME
-		var p = e.PHONEME
-		db.query_with_bindings("SELECT * FROM GPs WHERE Grapheme=? AND Phoneme=?", [g, p])
-		if db.query_result.is_empty():
-			var type = 0
-			if e.CV == "V":
-				type = 1
-			elif e.CV == "C":
-				type = 2
-			db.insert_row("GPs", {Grapheme=g, Phoneme=p, Type=type})
-		db.query_with_bindings("SELECT * FROM GPs WHERE Grapheme=? AND Phoneme=?", [g, p])
-		print(db.query_result)
-
-
-func _import_look_and_learn_data() -> void:
-	var file = FileAccess.open("res://data3/gp_list.json", FileAccess.READ)
-	var dict = JSON.parse_string(file.get_line())
-	for e in dict.values():
-		var file_path: = "res://data3/".path_join(look_and_learn_images).path_join(e.IMAGE) + image_extension
-		DirAccess.copy_absolute(file_path, get_gp_look_and_learn_image_path({
-			Grapheme = e.GRAPHEME,
-			Phoneme = e.PHONEME,
-		}))
-		file_path = base_path.path_join(language).path_join(look_and_learn_sounds).path_join(e.AUDIO) + sound_extension
-		DirAccess.copy_absolute(file_path, get_gp_look_and_learn_sound_path({
-			Grapheme = e.GRAPHEME,
-			Phoneme = e.PHONEME,
-		}))
-		file_path = (base_path.path_join(language).path_join(look_and_learn_videos).trim_suffix("/") + "s").path_join(e.FILENAME) + "_wide" + video_extension
-		DirAccess.copy_absolute(file_path, get_gp_look_and_learn_video_path({
-			Grapheme = e.GRAPHEME,
-			Phoneme = e.PHONEME,
-		}))
-
-
-func _update_gps_with_type() -> void:
-	var file = FileAccess.open("res://gp_list.json", FileAccess.READ)
-	var dict = JSON.parse_string(file.get_line())
-	for e in dict.values():
-		var g = e.GRAPHEME
-		var p = e.PHONEME
-		db.query_with_bindings("SELECT * FROM GPs WHERE Grapheme=? AND Phoneme=?", [g, p])
-		var id = db.query_result[0].ID
-		var type = 0
-		if e.CV == "V":
-			type = 1
-		elif e.CV == "C":
-			type = 2
-		db.query_with_bindings("UPDATE GPs SET Type=? WHERE id=?", [type, id])
-
-
-func _import_syllables() -> void:
-	var file = FileAccess.open("res://data3/words_list.json", FileAccess.READ)
-	var dict = JSON.parse_string(file.get_line())
-	
-	for e in dict.values():
-		if e.NB_GRAPHEME == 2 and e.NB_LETTER <= 3:
-			
-			# Inserts syllable
-			db.query_with_bindings("SELECT * FROM Syllables WHERE Syllable=?", [e.GRAPHEME])
-			if db.query_result.is_empty():
-				db.insert_row("Syllables", {Syllable=e.GRAPHEME})
-			
-			# Inserts GPs in syllable
-			db.query_with_bindings("SELECT * FROM Syllables WHERE Syllable=?", [e.GRAPHEME])
-			var syllable_id = db.query_result[0]["ID"]
-			
-			# Checks if GPsInSyllables is already inserted
-			db.query_with_bindings("SELECT ID FROM GPsInSyllables WHERE SyllableID=?", [syllable_id])
-			if db.query_result.is_empty():
-				var GP_list_str: String = e.GPMATCH
-				var GP_list: = GP_list_str.split(".")
-				
-				for i in GP_list.size():
-					var GP_str = GP_list[i]
-					var GP = GP_str.split("-")
-					
-					# Checks if GP exists
-					db.query_with_bindings("SELECT * FROM GPs WHERE Grapheme=? AND Phoneme=?", [GP[0], GP[1]])
-					if db.query_result.is_empty():
-						push_error("GP not found for " + GP_str)
-						continue
-					
-					var GP_id = db.query_result[0]["ID"]
-					db.insert_row("GPsInSyllables", {
-						SyllableID = syllable_id,
-						GPID = GP_id,
-						Position = i,
-					})
-
-
-func _import_words() -> void:
-	var file = FileAccess.open("res://data3/words_list.json", FileAccess.READ)
-	var dict = JSON.parse_string(file.get_line())
-	for e in dict.values():
-		db.query_with_bindings("SELECT * FROM Words WHERE Word=?", [e.GRAPHEME])
-		if db.query_result.is_empty():
-			db.insert_row("Words", {Word=e.GRAPHEME})
-		db.query_with_bindings("SELECT * FROM Words WHERE Word=?", [e.GRAPHEME])
-		var word_id = db.query_result[0]["ID"]
-		var GP_list_str: String = e.GPMATCH
-		var GP_list: = GP_list_str.split(".")
-		for i in GP_list.size():
-			var GP_str = GP_list[i]
-			var GP = GP_str.split("-")
-			db.query_with_bindings("SELECT * FROM GPs WHERE Grapheme=? AND Phoneme=?", [GP[0], GP[1]])
-			var GP_id = db.query_result[0]["ID"]
-			db.insert_row("GPsInWords", {
-				WordID = word_id,
-				GPID = GP_id,
-				Position = i,
-			})
-
-
-func _import_lessons() -> void:
-	var file = FileAccess.open("res://data3/gp_list.json", FileAccess.READ)
-	var dict = JSON.parse_string(file.get_line())
-	for e in dict.values():
-		var g = e.GRAPHEME
-		var p = e.PHONEME
-		db.query_with_bindings("SELECT * FROM GPs WHERE Grapheme=? AND Phoneme=?", [g, p])
-		var GP_id = db.query_result[0]["ID"]
-		var lesson_nb: = int(e.LESSON)
-		db.query_with_bindings("SELECT * FROM Lessons WHERE LessonNb=?", [lesson_nb])
-		var lesson_id: = -1
-		if db.query_result.is_empty():
-			db.insert_row("Lessons", {
-				LessonNb = lesson_nb
-			})
-			lesson_id = db.last_insert_rowid
-		else:
-			lesson_id = db.query_result[0]["ID"]
-		db.insert_row("GPsInLessons", {
-			GPID = GP_id,
-			LessonID = lesson_id,
-		})
-
-
-func _import_kalulu_3_word_sounds() -> void:
-	var file = FileAccess.open("res://data3/words_list.json", FileAccess.READ)
-	var dict = JSON.parse_string(file.get_line())
-	for e in dict.values():
-		var file_path = "res://data3/language/" + e.FILENAME + ".mp3"
-		DirAccess.copy_absolute(file_path, get_word_sound_path({
-			Word = e.GRAPHEME
-		}))
-
-
-func _import_kalulu_3_gp_sounds() -> void:
-	var file = FileAccess.open("res://data3/gp_list.json", FileAccess.READ)
-	var dict = JSON.parse_string(file.get_line())
-	for e in dict.values():
-		var file_path = "res://data3/language/" + e.FILENAME + ".mp3"
-		if e.GRAPHEME == "mu":
-			print("j")
-		DirAccess.copy_absolute(file_path, get_gp_sound_path({
-			Grapheme = e.GRAPHEME,
-			Phoneme = e.PHONEME,
-		}))
-
-
-func _remove_unusable_words() -> void:
-	var file = FileAccess.open("res://words_list.json", FileAccess.READ)
-	var dict = JSON.parse_string(file.get_line())
-	for e in dict.values():
-		if e.USABLE_WORD_GAME == "0":
-			db.query_with_bindings("SELECT * FROM Words WHERE Word=?", [e.GRAPHEME])
-			if not db.query_result.is_empty():
-				var word_id = db.query_result[0]["ID"]
-				db.delete_rows("Words", "ID=%s" % word_id)
-
-
-func _import_words_csv() -> void:
-	var file = FileAccess.open("res://data3/Copy of Manulex-infra-2.csv", FileAccess.READ)
-	file.get_line()
-	while not file.eof_reached():
-		var line: = file.get_csv_line()
-		_import_word_from_csv(line[0], line[2])
-
-
 func _import_word_from_csv(ortho: String, gpmatch: String, is_word: = true) -> Array:
 	var gp_list: = gpmatch.trim_prefix("(").trim_suffix(")").split(".")
 	var gp_ids: Array[int] = []
diff --git a/sources/utils/autoloads/lesson_logger.gd b/sources/utils/autoloads/lesson_logger.gd
index 7703598b..bf57434f 100644
--- a/sources/utils/autoloads/lesson_logger.gd
+++ b/sources/utils/autoloads/lesson_logger.gd
@@ -1,6 +1,6 @@
 extends Node
 
-const log_resource_class: = preload("res://sources/utils/minigame_resources/log.gd")
+const Log: = preload("res://sources/utils/minigame_resources/log.gd")
 
 # Contains the current log resource
 var log_resources: = {}
@@ -9,14 +9,17 @@ var log_resources: = {}
 func save_logs(logs: Dictionary, folder_path: String, minigame_name: String, lesson_nb: int, time: String) -> void:
 	var file_path: = folder_path + minigame_name + ".tres"
 	
+	var log_resource: LogResource
 	if not ResourceLoader.exists(file_path):
-		var log_resource: LogResource = log_resource_class.new()
+		log_resource = Log.new()
 		ResourceSaver.save(log_resource, file_path, ResourceSaver.FLAG_COMPRESS)
 	
 	if not file_path in log_resources:
-		var log_resource: = ResourceLoader.load(file_path)
+		log_resource = ResourceLoader.load(file_path)
 		log_resources[file_path] = log_resource
+	else:
+		log_resource = log_resources[file_path]
 	
-	log_resources[file_path].add_log(lesson_nb, logs, time)
+	log_resource.add_log(lesson_nb, logs, time)
 	
-	ResourceSaver.save(log_resources[file_path], file_path, ResourceSaver.FLAG_COMPRESS)
+	ResourceSaver.save(log_resource, file_path, ResourceSaver.FLAG_COMPRESS)
diff --git a/sources/utils/autoloads/opening_curtain.gd b/sources/utils/autoloads/opening_curtain.gd
index 3f940632..91442bed 100644
--- a/sources/utils/autoloads/opening_curtain.gd
+++ b/sources/utils/autoloads/opening_curtain.gd
@@ -22,4 +22,4 @@ func close() -> void:
 
 
 func _on_animation_player_animation_finished(animation_name: StringName) -> void:
-	emit_signal("animation_finished", animation_name)
+	animation_finished.emit(animation_name)
diff --git a/sources/utils/autoloads/server_manager.gd b/sources/utils/autoloads/server_manager.gd
index 9e9f647e..799bca41 100644
--- a/sources/utils/autoloads/server_manager.gd
+++ b/sources/utils/autoloads/server_manager.gd
@@ -53,7 +53,7 @@ func _get_request(URI: String, params: Dictionary) -> void:
 	
 	var req: = URL + URI
 	var is_first_param: bool = true
-	for key in params.keys():
+	for key: String in params.keys():
 		if is_first_param:
 			req += "?"
 			is_first_param = false
@@ -77,8 +77,7 @@ func _post_json_request(URI: String, data: Dictionary) -> void:
 	var headers: = _create_request_headers()
 	headers.append("Content-Type: application/json")
 	
-	var json = JSON.stringify(data)
-	if http_request.request(req, headers, HTTPClient.METHOD_POST, json) == 0:
+	if http_request.request(req, headers, HTTPClient.METHOD_POST, JSON.stringify(data)) == 0:
 		await request_completed
 	else:
 		code = 500
@@ -86,7 +85,7 @@ func _post_json_request(URI: String, data: Dictionary) -> void:
 
 #endregion
 
-func _on_http_request_request_completed(result, response_code, headers, body):
+func _on_http_request_request_completed(_result: int, response_code: int, _headers: PackedStringArray, body: PackedByteArray) -> void:
 	code = response_code
 	if body:
 		json = JSON.parse_string(body.get_string_from_utf8())
diff --git a/sources/utils/autoloads/user_data_manager.gd b/sources/utils/autoloads/user_data_manager.gd
index 09d98a2b..af17bcb5 100644
--- a/sources/utils/autoloads/user_data_manager.gd
+++ b/sources/utils/autoloads/user_data_manager.gd
@@ -103,7 +103,7 @@ func login_student(code : String) -> bool:
 	if not _device_settings or not teacher_settings:
 		return false
 	
-	var students = teacher_settings.students[_device_settings.device_id] as Array[StudentData]
+	var students: Array[StudentData] = teacher_settings.students[_device_settings.device_id] as Array[StudentData]
 	if students:
 		for s in students:
 			if s.code == code:
@@ -183,7 +183,7 @@ func add_device() -> bool:
 	if not teacher_settings.students:
 		return false
 	
-	var device_id = teacher_settings.students.keys().back() + 1
+	var device_id: int = teacher_settings.students.keys().back() + 1
 	
 	# Adds the new device
 	var students_array : Array[StudentData] = []
@@ -212,7 +212,8 @@ func add_student(device_id : int, student_data : StudentData) -> bool:
 		return false
 	
 	# Adds the student on the device
-	teacher_settings.students[device_id].append(student_data)
+	var device_students: Array[StudentData] = teacher_settings.students[device_id]
+	device_students.append(student_data)
 	
 	# Saves the settings
 	_save_teacher_settings()
@@ -232,7 +233,7 @@ func delete_student(device_id : int, code : String) -> bool:
 	
 	# Finds the student
 	var student_data : StudentData
-	for s in teacher_settings.students[device_id]:
+	for s: StudentData in teacher_settings.students[device_id]:
 		if s.code == code:
 			student_data = s
 			break
@@ -240,7 +241,8 @@ func delete_student(device_id : int, code : String) -> bool:
 	# Deletes the saves ??
 	
 	# Removes the student
-	teacher_settings.students[device_id].erase(student_data)
+	var device_students: Array[StudentData] = teacher_settings.students[device_id]
+	device_students.erase(student_data)
 	
 	# Saves the settings
 	_save_teacher_settings()
@@ -300,11 +302,11 @@ func _on_user_progression_unlocks_changed() -> void:
 	_save_student_progression()
 
 
-func get_student_progression_for_code(device: int, student: String) -> UserProgression:
+func get_student_progression_for_code(device: int, code: String) -> UserProgression:
 	if not teacher_settings or not teacher_settings.students.has(device):
 		return
 	
-	var student_path: String ="user://".path_join(_device_settings.teacher).path_join(str(device)).path_join(_device_settings.language).path_join(student)
+	var student_path: String ="user://".path_join(_device_settings.teacher).path_join(str(device)).path_join(_device_settings.language).path_join(code)
 	var progression_path: String = student_path.path_join("progression.tres")
 	
 	var progression: UserProgression
@@ -318,8 +320,8 @@ func get_student_progression_for_code(device: int, student: String) -> UserProgr
 	
 	return progression
 
-func save_student_progression_for_code(device: int, student: String, progression: UserProgression) -> void:
-	var progression_path: String = "user://".path_join(_device_settings.teacher).path_join(str(device)).path_join(_device_settings.language).path_join(student).path_join("progression.tres")
+func save_student_progression_for_code(device: int, code: String, progression: UserProgression) -> void:
+	var progression_path: String = "user://".path_join(_device_settings.teacher).path_join(str(device)).path_join(_device_settings.language).path_join(code).path_join("progression.tres")
 	ResourceSaver.save(progression, progression_path)
 
 #endregion
diff --git a/sources/utils/fx/fireworks.gd b/sources/utils/fx/fireworks.gd
index eb949e85..8129e45a 100644
--- a/sources/utils/fx/fireworks.gd
+++ b/sources/utils/fx/fireworks.gd
@@ -2,14 +2,17 @@ extends Node
 
 signal finished()
 
+const Rocket: = preload("res://sources/utils/fx/rocket.gd")
+const rocket_scene: = preload("res://sources/utils/fx/rocket.tscn")
+
 @export var number_of_rockets: = 25
 
-@onready var fire_delay_timer: = $FireDelayTimer
+@onready var fire_delay_timer: Timer = $FireDelayTimer
 @onready var starts: = $Starts.get_children()
 @onready var ends: = $Ends.get_children()
-@onready var rockets: = $Rockets
+@onready var rockets: Node2D = $Rockets
+
 
-const firework_class: = preload("res://sources/utils/fx/rocket.tscn")
 
 var count: = 0
 
@@ -24,12 +27,13 @@ func _on_FireDelayTimer_timeout() -> void:
 		finished.emit()
 		return
 	
-	var start_point: Vector2 = starts[randi() % starts.size()].global_position
-	var end_point: Vector2 = ends[randi() % ends.size()].global_position
 	
-	var rocket: = firework_class.instantiate()
+	var start_node: Node2D = starts[randi() % starts.size()]
+	var end_node: Node2D = ends[randi() % ends.size()]
+	
+	var rocket: Rocket = rocket_scene.instantiate()
 	rockets.add_child(rocket)
-	rocket.start(start_point, end_point + Vector2(randf_range(-25.0, 25.0), randf_range(-25.0, 25.0)))
+	rocket.start(start_node.global_position, end_node.global_position + Vector2(randf_range(-25.0, 25.0), randf_range(-25.0, 25.0)))
 	
 	count += 1
 	fire_delay_timer.start(randf_range(0.1, 0.25))
diff --git a/sources/utils/fx/rocket.gd b/sources/utils/fx/rocket.gd
index ab440ece..d51f11ef 100644
--- a/sources/utils/fx/rocket.gd
+++ b/sources/utils/fx/rocket.gd
@@ -3,16 +3,16 @@ extends Path2D
 @export var spread_angle := PI/8.0
 @export var segments := 5
 
-@onready var path_follow: = $PathFollow2D
+@onready var path_follow: PathFollow2D = $PathFollow2D
 
-@onready var traveling_timer: = $TravelingTimer
-@onready var explosion_timer: = $ExplosionTimer
+@onready var traveling_timer: Timer = $TravelingTimer
+@onready var explosion_timer: Timer = $ExplosionTimer
 
-@onready var rocket: = $PathFollow2D/Rocket
-@onready var explosion_particles: = $PathFollow2D/ExplosionParticles
+@onready var rocket: Sprite2D = $PathFollow2D/Rocket
+@onready var explosion_particles: GPUParticles2D = $PathFollow2D/ExplosionParticles
 
-@onready var firework_audio_player: = $FireworkAudioPlayer
-@onready var blast_audio_player: = $BlastAudioPlayer
+@onready var firework_audio_player: AudioStreamPlayer2D = $FireworkAudioPlayer
+@onready var blast_audio_player: AudioStreamPlayer2D = $BlastAudioPlayer
 
 const firework_sounds: = [
 	preload("res://assets/sfx/fireworks_1.mp3"),
@@ -85,7 +85,7 @@ func _on_TravelingTimer_timeout() -> void:
 	rocket.visible = false
 	explosion_timer.start()
 	blast_audio_player.play()
-	for particles in explosion_particles.get_children():
+	for particles: GPUParticles2D in explosion_particles.get_children():
 		particles.emitting = true
 
 
diff --git a/sources/utils/keyboard_spacer.gd b/sources/utils/keyboard_spacer.gd
index 3b870ef8..f32ccd13 100644
--- a/sources/utils/keyboard_spacer.gd
+++ b/sources/utils/keyboard_spacer.gd
@@ -3,13 +3,14 @@ class_name KeyboardSpacer
 
 var screen_scale: float
 
-func _ready():
+func _ready() -> void:
 	screen_scale = DisplayServer.screen_get_scale()
 
 
-func _process(delta):
+func _process(_delta: float) -> void:
 	if OS.has_feature("mobile"):
-		var margin = DisplayServer.virtual_keyboard_get_height()
+		var margin: = DisplayServer.virtual_keyboard_get_height()
 		if OS.get_name() == "Android":
+			@warning_ignore("narrowing_conversion")
 			margin *= screen_scale
 		self["theme_override_constants/margin_bottom"] = max(floori(margin), 0)
diff --git a/sources/utils/math/bezier.gd b/sources/utils/math/bezier.gd
index 7bff3ebf..31b95aaa 100644
--- a/sources/utils/math/bezier.gd
+++ b/sources/utils/math/bezier.gd
@@ -6,11 +6,11 @@ static func bezier_square_error(current_points: Array, ref_points: Array) -> flo
 	var samples: = bezier_sampling(current_points, 25)
 	var curve: = Curve2D.new()
 	
-	for point in samples:
+	for point: Vector2 in samples:
 		curve.add_point(point)
 	
 	var error: = 0.0
-	for point in ref_points:
+	for point: Vector2 in ref_points:
 		var curve_point: = curve.get_closest_point(point)
 		error += pow(curve_point.distance_to(point), 2.0)
 	
diff --git a/sources/utils/minigame_resources/log.gd b/sources/utils/minigame_resources/log.gd
index 2bf4fd01..a8e30a43 100644
--- a/sources/utils/minigame_resources/log.gd
+++ b/sources/utils/minigame_resources/log.gd
@@ -1,17 +1,18 @@
 extends Resource
 class_name LogResource
 
-@export var logs: = {}
+@export var logs: Dictionary = {} # int : Dictionary {String : Dictionary}
 
 
 func add_log(lesson_nb: int, new_log: Dictionary, time: String) -> void:
 	if not logs.has(lesson_nb):
 		logs[lesson_nb] = {}
 	
-	if not logs[lesson_nb].has(time):
+	var lesson_logs: Dictionary = logs[lesson_nb]
+	if not lesson_logs.has(time):
 		logs[lesson_nb][time] = new_log
 	else:
 		var i: = 2
-		while logs[lesson_nb].has(time + "_" + str(i)):
+		while lesson_logs.has(time + "_" + str(i)):
 			i += 1
 		logs[lesson_nb][time + "_" + str(i)] = new_log