One of the first entries that I've played, and it seems that this Jam is gonna have quite a few competitors for the top place!
I really liked the game, however I wasn't able to finish it one run.
Not because it was too difficult, but because every time I died, it frustrated me.
Quite often I missed that jump because I was just one second off, and I found that quite a few of those were on the final jump before reaching the exit - which resulted in me having to start the entire level again. Now although that's not necessarily a bad mechanic it just really punishes the player for not being good at the level and it's a little difficult, from a players perspective, to play through 12 of those levels.
Now with my rant out of the way, let me get to the good stuff!
I absolutely loved the idea. I've never seen it done before and it was executed really well. Although maybe the levels can gradually increase in difficulty as you progress? It seemed like the levels went from easy to hard, to really easy to really hard, a little difficult to keep up with. But yeah, the graphics style was nice and simple, the music was decent and the game-play was original and clean.
Please don't read this as me being harsh, it was a great game and I'm definitely going to keep it and finish the last few levels some other time - I think got up to 10ish?. I'm just trying to give some constructive critism to try and help you improve your skills