Awesome! I think I saw a similar game, where you could teleport between multiple dimensions in this jam as well, but it was top-down and not a platformer.
Good idea, nice implementation. Some things I would change are a more thought-out level or room order, I was lost half the time, but then again, my sense of location is really bad. xd
And as the others say, the controls could be a bit crisper.
Other than that, it was fun changing between dimensions, and kind of addicting, even with such simple graphics! Way to go! :)