It's a fun concept! It took me a while to understand that the achievements are hinting me how to pass the level. I think my confusion came from some level are passible with an achievement? Is that on purpose or is that a bug?
I also liked the 8-bit animations, and the platforming physics. I read from the comments down below it's not what you wanted exactly, but I liked that the up arrow gives me a bit more wiggle room when I jump XD
Great submission!