Wow, I had a lot of fun with this! I gave up around level 12 or so because it was getting pretty hard, but the variety of physics puzzles and platforming challenges was really impressive so far (the level with increasingly higher bounces on the green ladder was a highlight). I really liked the idea of the different kinds of ladders, and my only complaint would be that the controls/handling felt like it could be tighter (I died several times because I expected to jump while running off an edge but didn't).
The intro cutscene was also awesome!