I had fun with this. The first level could actually catch a few people out who dont realise the kind of mechanics you've implemented. I got through quite a few levels but one of the things that you are missing is a Level indicator either somewhere on the screen during a level or when you complete the level it could say "level x completed". I got stuck on a level where I couldn't see any platforms and at that point it got really hard - from a design perspective maybe there could be a more obvious (albeait subtle) clue as to where you should be looking when you get to the harder levels. But I really enjoyed the game. Thought the art was really charming, I loved the wall-jump mechanics and the moving from one side of the screen to the other - which made me think about how I want to solve puzzles and that demonstrates some good design principles. Well done to you guys and great submission.