Simple, put polished! I really enjoyed the music, really complimented the poolside setting :)
It might be nice to add on screen point values (like a mini +20 , - 10 or something) for when the ball catches the falling objects or goes underwater, that way the player can know exactly what those things do without having to keep looking at the score, which can break concentration.
Aside from that, great work!
-Sasha