Fair point.
At this point, we see why Z might've been awkward for jumping but our vision was for people to have setup like this:
Left hand:
Ring finger finger on Z
Middle finger on X
Point/Index finger on C
Thumb on SPACE for attacking
Right hand on arrows
Due to multiple controls we 'stole' controls from games like Celeste and Hollow Knight so we didn't actually expect people to not like it haha, I guess we just got used to it thru the development.
But we're glad for people pointing out the issue, and we'll make sure to keep that in mind next time. Thank you so much!!