Move your cursor to deflect the ball using the red paddle. Your goal is to make the ball hit the blue paddle’s side without letting it hit the red paddle’s side.
Thanks to @kbuhler for the original. I added a basic algorithm that allows your velocity to be inherited by the ball, and made the paddle control slightly more difficult. This is still kind of broken, however. Unfortunately, more dynamic physics means more bugs… the ball can get temporarily stuck in the paddle when struck from the side. It’s not that persistent though.