You might have to click the green flag a couple of times to start or restart. If you are the ball, you can move anywhere, but if you touch the paddle, you lose. Your objective is to touch the red. If you are the paddle, you can move up and down. If you touch the ball, the ball restarts. Your objective is to keep the ball away from the red for your choice of time. W and S for paddle. Arrows for ball.
All credit to me. This is still a work in progress. If there are any bugs, please comment them.