I really love the gameplay and how you can almost create your own strategies for navigating through the level.
I think this kind of game would also be great for speed running, where players can upload their fastest scores for each level and make it competitive, similar to Super Meat Boy. I ended up playing through some levels twice just to try out different strategies (like jumping, dashing in the air, and then swapping between dimensions really quick to maintain altitude and not die).
I had a lot of fun playing around with the mechanics and I think this would be a great start to a bigger, more polished game. Great work!