Great concept, although in my opinion the role reversal aspect is not really present here, since you still play a pinball game as a normal player.
Regardless, considering you made this in 24 hours, you did a great job! The main mechanic is interesting and fun to play. The visual effects on hit are also a nice touch. The only problem i can see here is that after couple of wins you can just plug the holes, so your ball won't fall, but to be honest, that's not much of a problem and can be fixed later if needed.