itch.io

If you feel burnt out from a project, it probably means it's time to stay away from it. If you push yourself anyway, you might end up hating it.

What I'd suggest is : Focus on small, new projects/prototypes to practice skills you weren't focusing on previously (I'd recommend UI or sound, don't underestimate text based gameplay!)
Then when you feel like it, come back to MoC, either update it with knowledge you've gained, or even remake it from a fresh project file!

I won't pretend like I'm a sage in the domain, you already seem to be doing great on your own, but from a creator to another, enjoy your break first.
Burnout sucks 10× more than the guilt you may get when taking a break.

I cannot get the password prompt to disappear.

Clicking on the "back" button gives visual and audio feedback, but nothing else changes

Next time your health is at risk, please don't bother wrapping up a build to publish it...
While I do appreciate the effort you make to keep us informed, I'd be much more concerned about the severity of your condition than a delayed release.
Take care

No it's a feature

Been stuck there for a while too
I put it in the easiest mode & farmed for points to increase strength stat.
went direcly under the head & spammed the blue magic, trying to avoid as much spit as possible
once the magic depleted, switched to purple and continued
got a bit of blue back until I spammed it again, turns out it was enough to defeat it