public override void Update(GameTime gameTime) { if (_enemyGroup.AllDestroyed() || _loseGame) { _backToMenuTime += gameTime.ElapsedGameTime.TotalMilliseconds; if (_backToMenuTime >= 3000) { AudioManager.StopTheme(); AlienAttackGame.Instance.SetState(GameState.TitleScreen); } _enemyGroup.Reset(); _playerShots.Clear(); } else { MovePlayer(gameTime); UpdatePlayerShots(gameTime); } // as long as we're not in the lose state, update the enemies if (!_loseGame) { _enemyGroup.Update(gameTime); } HandleCollisions(gameTime); }