What you've made here is a VERY cool game that is almost didn't "get" while playing, here's why:
I didn't get at first that each character is controlling a different axis, that platforms scale both directions, and it's not very clear that X can do it from both sides. It might need a bit more tutorialization, more distinct characters maybe? It also is a testament to your (too?) intuitive design for the first puzzles: I simply tried to bring each character to its platform, and it worked naturally, leading me to thinking that platforms had a built-in scale direction.
I'm writing all this criticism because they're minor issues, and because when I understood the mechanics it immediately clicked and my brain EXPLODED because how cool the concept was: that's an excellent start for a future game, and I'd buy it. Congratulations!
(also please use/allow the spacebar for jump ^^)