add ant bying and pause menu

scripts/globals/fullscreen_manager.gd

@@ -3,6 +3,10 @@ extends Node
 var is_fullscreen: bool = false
 
 
+func _ready() -> void:
+	process_mode = Node.PROCESS_MODE_ALWAYS
+
+
 func _input(event: InputEvent) -> void:
 	if event.is_action_pressed("toggle_fullscreen"):
 		_toggle_fullscreen()