Move the mouse up and down to control your black bar. Try and bounce the ball onto the blue to score. Win by scoring 15!
I spotted some bugs, and couldn't resist solving them :-) However, I still haven't got rid of all of them, so do tell me if you spot any - particularly if you know how to solve them ;-) 19.12.16 (12.19.16 US format) - changed the colour scheme and made the motion of the ball bouncing smoother.