public void tick()
    {
        if(yVelocity < 0)
        {
            if(level.blockFree(this,false,1))
            {
                y += yVelocity;
            }
            else
            {
                yVelocity = 0;
            }
        }
        else
        {
            y += yVelocity;
        }


        x += xVelocity;
    }