So many games use Z and X for shoot and jump, but not necessarily in that order. Muscle memory is a bitch. Why are remappable controls still not a thing in 2020? :'( And I'm sure every AZERTY/QWERTZ keyboard user just blammed and moved on, lol.
Anyway, pretty entertaining bullet hell overall. The first boss with ricocheting shots at the pizza parlor felt a little too RNG, but everything else was definitely fair. Jump physics are awkward: you don't get any hangtime at the zenith of your jump unless it's a full-height jump, which is highly unrealistic and makes jumps feel imprecise. Fixing that (and making controls remappable) would make gameplay feel a lot tighter.
Also, I forget which boss it is (the second pizza parlor boss?), but the one who sits at the middle of the screen and fires yellow+blue+green shots all around forgot to lock her exit door. I gave myself a break on that boss and just cheesed her to death with hit-and-run tactics accordingly.