Great game! The 'M' button tutorial disappeared way to fast for me (it was shown for around a second). On lvl 2, it seems like the collision mismatches the visuals. Can't get to the right corner to climb. And it is possible to jump on an "invisible platform" to the left of it. Couldn't go past lvl 2 because of that.

Very entertaining and relaxing puzzler.
I found a bug, maybe someone else already told you. When you jump too close to the ceiling (specially on stairs) the bear gets stuck on mid air on doesn't go down. It's a good thing "R" restarts the level, otherwise it would be a serious issue.
Played using firefox (up to date, same as flash plugin)