game looks interesting but the wall jump is too janky. For most games in this format wall jumping is extremely annoying to pull off since you don't have fine control and have to spend forever to figure out the correct timing for the button presses.
You're right, looking back it is far too timing-dependant.
For what it's worth, I've uploaded an adjusted version with where the walljumping is hopefully a bit easier (stronger jumps, so timing should be less critical).