private void ShootEnemy(int x, int y)
{
int enemyIndex = enemies.GetIndexByPosition(x, y);
enemies[enemyIndex].Lifes--;
if (enemies[enemyIndex].Lifes == 0)
{
enemies.Delete(enemyIndex);
gameField.MakeDestroyed(x, y);
}
if (enemies.Count == 0)
{
Win();
}
}