public void AddToLives(int amount)
        {
            if ( amount == -1 )
            {
                ResetCharactersPositions();
                pacman.IsPaused = true;
            }

            _lives += amount;

            if ( _lives == 0 )
            {
                GameOverText = "You have Died!";
            }
        }

        public string GameOverText
        {
            get { return _gameOverText; }
            private set
            {
                _gameOverText = value;
                _gameOver = true;

            }
        }