Oh wow this game has a lot of polish! The sound and visuals are just great and the animations look beatifull! They all come together to bring a really pleasant experience :)
I really the game mechanic and it has a lot of potential to be released as a full game. I have two things to point out though. I think that if the clock hands movement would be snappy, it would bring a bit more of control over the calculations. Sometimes I pushed a hand with too much force and had to go get it from the other side haha. Also, maybe a jump mechanic could work well so the player can jump over the hands and move them more freely. That's how I discovered a debug feature I think you forgot in the game (pressing Space) hehe :P
Really fun idea, great work!