I really like the idea and it's very well done! Of course sound effects would have really helped! I could hear them in my head as I was playing.
From the description seems you were short on time, so I'm sure you would have added sound too if you could. But one other thing I think could really help is visibility. Could there be a way to have the camera "lead" the ball to where it's going? Just by a bit might help. Is that even possible with a rigid body 2d? (Assuming that's what you used.) Not sure. Sounds like a cool technical challenge - or maybe just a google search. Ha ha.
Anyway, if you haven't already, please check out my game! Along with rating it, I'd love to hear your feedback too! Thanks!