void OnPlayerLifeChanged()
 {
     if (GameMode == (int)GameModes.Casual)
     {
         LivesText.text = "CASUAL";
     }
     else if (GameMode == (int)GameModes.Normal)
     {
         LivesText.text = PlayerLives.ToString();
     }
     if (PlayerLives <= 0)
     {
         GameOver();
     }
 }