The game is addicting.
The wheel/spike/gear things have insanely sensitive hit-detection. Not necessarily a "bad" thing. But it is frustrating.
Nothing really bad to say about it. I wish I had something more constructive. It's simple and I like it.
For me this game had 1 main problem: I did not see what was coming next. I pretty often had to guess where to go and to jump down randomly and pretty often died because I went the wrong way or i didn't have enough time to doge the buzz saws. Just make the player see more of what's coming next. I also dropped through the floor once, the game seems to be a little glitchy.