nice idea, well done! my only suggestion would be to limit the direction-angle the ball can start at, because sometimes it starts going straight at your pad and there's not a lot of time to get out of the way, and sometimes it starts bouncing almost completely vertically, and it takes forever for the ball to reach one side, at which point the pad likely can't escape the ball moving in a vertical line.
but other than that, very good! welcome to the gwj! :)