static public bool hit(GameObject go)
    {
        if (go.GetComponentInChildren <TextMesh>().text.Length == 1)
        {
            go.GetComponentInChildren <TextMesh>().text = "=_=";
            Destroy(go, 2f);
            enemyShips.Remove(go);

            if (enemyShips.Count <= 12)
            {
                for (int i = 0; i < stage; i++)
                {
                    EnemiesManager.MakeRandomShip(dropedEnemies++);
                }
                stage++;
            }
            return(true);
        }
        go.GetComponentInChildren <TextMesh>().text = go.GetComponentInChildren <TextMesh>().text.Substring(1);
        return(false);
    }