I got stuck on level 9! Nice game, the puzzles were fun and well-thought out :)
It would have been nice to restart the level if you fall down, instead of having to retry and place all the blocks again. There were a few points where I had the blocks correct, but I fell down somewhere and couldn't get back up and had to re-place them all over again. Perhaps a hint mechanic might have been a nice addition too!
Great game in 48 hours! :)