The art and music was really well done. I was impressed when you introduced that falling down looped you around the screen because my thought process was "Oh I can't get those crystals whatever I'll get the ones below- OHHH".
The keyboard controls were a pain though. I kept wanting to hit space for jump and I had to shift around my normal keyboard finger placement so that my pinky wasn't on the Z because it's awkward and it started to hurt. I would've liked if just pressing down pushed you through the platforms instead of having to press jump as well.
Great Job!