added the game

Scripts/UI/QuitDialog.gd

@@ -0,0 +1,17 @@
+extends Control
+
+signal cancelled
+var is_active := false
+
+func _physics_process(delta: float) -> void:
+	modulate.a = lerpf(modulate.a, int(is_active), delta * 15)
+	if Input.is_action_just_released("ui_back") and is_active:
+		cancelled.emit()
+		is_active = false
+		$AnimationPlayer.stop()
+
+func start() -> void:
+	$AnimationPlayer.play("Animation")
+	is_active = true
+	await $AnimationPlayer.animation_finished
+	get_tree().quit()