Since you're using spacebar to jump instead of W, I think there should at least be an option to use the arrow keys instead of A and D. Or the option to use W to jump. Otherwise, it's a bit awkward for me but that's just a personal preference.
On that note, I wish I could restart on my one, instead of having to kill myself and then wait. The lack of menu options irks me a bit. Like going back to a previous level and restart the level, things like that (along with different controls in settings).
The wall jump is extremely glitchy. Sometimes I'm not even pressing any key and I appear on top of a block as if I jumped. Or maybe the colliders are off? Either way, it's not working properly.
It's not extremely difficult but the controls made it odd to play. I also feel like I've played something similar a thousand times before so it's not particularly interesting to me. I like the simplistic look though. Maybe I'll come back if there are updates.