public void checkBulletCollision()
    {
        for(int i = 0; i<bullets.size(); i++){
            Sprite collisionSprite = getSpriteCollision(bullets.get(i));
            if(collisionSprite instanceof Grub || collisionSprite instanceof Fly){
                Creature badguy = (Creature)collisionSprite;
                badguy.setVidas(badguy.getVidas()-1);
                map.removeSprite(bullets.get(i));
                bullets.remove(i);
                if(badguy.getVidas()==0){
                    badguy.setState(Creature.STATE_DYING);
                    score+=100;
                }
            }
        }
    }