Very interesting idea, but I think it needed better execution. I found a lot of the puzzles quite interesting, especially when the mechanic of the ball rolling was introduced. However, I don't quite like how most of the round shapes (cone and cylinder) are functionally identical to their sharp-cornered counterparts. I assume they're there so it's possible to create a ball, but some unique behavior, whatever that might be, would make them more interesting.
Also, it's possible to fall through the floor, which happens somewhat unpredictably.