Very good!
Usually games of passing levels and levels don't get me playing for too long, but this one did. I passed the game 2 times, one in easy and one in hard to get a better score (and played some levels quite a few times). The levels are very well designed, you can notice that they are done in a way that you can get all (or most) of the clocks with some technique. The concept is simple yet addictive, and that's what we look for in a game like this. Also, the visual aspect is very polished in its own style. It's an awesome game! I don't give it a 10 because I feel like pressing one button and getting killed so many times can get annoying, but I know it's part of the game. It's a 5/5 still :) Great work!