better sound sliders

scripts/Main.gd

@@ -3,6 +3,9 @@ extends Control
 @onready var press_any_key_screen = $PressAnyKeyScreen
 var current_menu = null
 
+const MAIN_MENU_SCENE = preload("res://ui/MainMenu.tscn")
+const SETTINGS_MENU_SCENE = preload("res://ui/SettingsMenu.tscn")
+
 func _ready():
 	print("Main scene ready")
 	press_any_key_screen.any_key_pressed.connect(_on_any_key_pressed)
@@ -14,14 +17,14 @@ func _on_any_key_pressed():
 
 func show_main_menu():
 	clear_current_menu()
-	var main_menu = preload("res://ui/MainMenu.tscn").instantiate()
+	var main_menu = MAIN_MENU_SCENE.instantiate()
 	main_menu.open_settings.connect(_on_open_settings)
 	add_child(main_menu)
 	current_menu = main_menu
 
 func show_settings_menu():
 	clear_current_menu()
-	var settings_menu = preload("res://ui/SettingsMenu.tscn").instantiate()
+	var settings_menu = SETTINGS_MENU_SCENE.instantiate()
 	settings_menu.back_to_main_menu.connect(_on_back_to_main_menu)
 	add_child(settings_menu)
 	current_menu = settings_menu