Just played your game; it's not too difficult. Not all criticism is always valid. The fact that people are complaining about level 2, which isn't even a puzzle level tells you that maybe there's something wrong with game feel. In this case, I think the problem is that you don't have a jump buffer when falling off platforms. I think if you added a 3 frame window or so after walking off a platform where you can still jump, people would definitely have significantly less trouble with level 2. But, gotta say, super impressed by the amount of levels you have for a game jam game, and I'm still going to give you a 5 for design.