I think what's standing out is the controls, I don't know how to shoot sideways (if that's possible, if it isn't then the boss is gonna be really tedious to damage).
How to shoot downwards (it just seemed to happen and I went with the flow, I never exactly knew how it worked).
How to actually do the plunging attack since ‘↓’+‘Space’ wasn't instructive enough for my caveman brain.
I didn't mean my comments about the instructions literally, more so I meant that I have no idea what I'm actually doing.
'↓’+‘Space’ seems to shoot all ammo then dash backwards? I don't know if that's the plunge attack.
Is 'Mid-air + '↓’+Space’ supposed to be how to shoot downwards? because that doesn't seem to work or be the case.

Ah!!I got it, actually '↓’+‘Space’ do cause a dash backwards, and in the mid-air, it's leading to rapid descending and at that time the character could perform a stomp on enemy (Maybe I shouldn't call that plunge attack...) only after a stomp, shooting downward is allowed
I'll try some way to make that more natural and visually recognizable...!