settings, small fixes

scripts/start_menu.gd

@@ -0,0 +1,28 @@
+extends Node2D
+
+@export var settings : Control
+
+# Called when the node enters the scene tree for the first time.
+func _ready() -> void:
+	SoundManager.play_music("title")
+
+
+# Called every frame. 'delta' is the elapsed time since the previous frame.
+func _process(delta: float) -> void:
+	pass
+
+
+func _on_start_button_pressed() -> void:
+	if !WorldState.done_tuto:
+		WorldState.done_tuto = true
+		SceneTransition.change_scene("res://scenes/tutorial.tscn")
+	else:
+		SceneTransition.change_scene("res://scenes/stage1.tscn")
+
+
+func _on_settings_pressed() -> void:
+	settings.visible = true
+
+
+func _on_exit_pressed() -> void:
+	get_tree().quit()