private void OnTriggerEnter(Collider other)
    {
        string tag = other.tag;

        if (tag == "coin")
        {
            GS.addCoin();
            //destroy the coin i hit
            Destroy(other.gameObject);
        }

        if (tag == "apple")
        {
            PC.shrink();
            //destroy the apple i hit
            Destroy(other.gameObject);
        }

        if (tag == "laser")
        {
            LS.playerWasHit();
        }
    }