std::vector<Missile*>::iterator iterMissile = game->missiles.begin();
        std::vector<Asteroid*>::iterator iterAsteroid = game->asteroids.begin();

        while (iterMissile != game->missiles.end()) {

            while (iterAsteroid != game->asteroids.end()){
                if ((*iterAsteroid)->isHit(*iterMissile)){
                    delete (*iterMissile);
                    game->missiles.erase(iterMissile);
                    break;
                }
                iterAsteroid++;
            }
            (*iterMissile)->move();

            if ((*iterMissile)->getX() > 0.50f){
                delete (*iterMissile);
                game->missiles.erase(iterMissile);
            }

            iterMissile++;
        }