private void Awake()
{
btnStart.onClick.AddListener(() => StartCoroutine(OnBtnStart()));
btnExit.onClick.AddListener(OnBtnExit);
bool lvl1Done = SaveDataController.IsLevelDone(1);
bool lvl2Done = SaveDataController.IsLevelDone(2);
bool lvl3Done = SaveDataController.IsLevelDone(3);
btnLevel1.SetEnabled(true);
btnLevel2.SetEnabled(lvl1Done);
btnLevel1.AddAction(() => SelectLevel(1));
btnLevel2.AddAction(() => SelectLevel(2));
}