I'm extremely picky about platformer jumps so take it with a grain of salt if you'd like, but personally I found the jump too floaty. The walljump felt also inconsistent, to some extent, but that's the nature of walljumps, they never quite work how you think they should I find. Minor annoyance was the game starting with the ability to move right but your description saying it'd be the opposite :) Also at some point the cricket loop ran out, and i saw a few strange pink squares pop up at the bottom of the screen a couple times. No idea what the latter's about.
It's a really solid idea for a game I think - the idea of building up your platformer character piecemeal is cool and is a good use of the enhance theme. You did a great job with the overall platformer level design I think, would be cool to see what else you could add!