The story is alright and the gameplay is a good concept with so-so execution. If you're going to require these amounts of precision from my fingers you must stop making me play a concurrent game of "keyboard Twister" with my hand, and require less precision early on. In my two plays so far I've given up partway through just because I couldn't make the jump with sufficient precision. In the second case I was doing better, but I think the walljump upgrade actually made the jump I gave up on *more* difficult.
The music and graphics weren't bad but the music felt a little unfitting--almost more like an old spacey MOD than a cave-exploration jam.
This is a really good idea and fairly engaging for what it is. It actually feels good to get right! But the execution still comes off a little trolly and it's unclear if that's what you mean to do. My recommendation is to either fix that (if it's not intended) or if it is intended, balance your troll vs. fun ratio a little more in favor of fun, and I think you'll have something really promising instead of something neat but kind of annoying.