[Ataros]

Maybe it is worth always checking that an object exists before doing smth with it, e.g.

        {
            if (bp != null)
                bp.destroy();         
        }

 {
                if (enemyGG[i] != null)
                    if (result.Pos().distance(ref attackerPos) > enemyGG[i].Pos().distance(ref attackerPos)) 
                        { result = enemyGG[i]; }
            }