This was a great demo! It looks like it's well on its way to being a fun game.
I will say that I had some trouble at the same point as others seem to have had trouble: the dreaded "red box hittable by a normal fireball but not by anything else" section, lol. Your response to another comment implies there is a built-in means of solving the puzzle, though; so, as you have already pointed out, all you need to do is apply an extra note there to inform players of the correct course of action and (hopefully) resolve the issue.
I recorded just under 15 minutes worth of my first two attempts, the first attempt full of a lot more fumbling than my second, but they both stop at the same section (take a guess which one, lol), so I don't know how helpful the recording would be. As soon as I figure out how to share it, I would be happy to do so.
Viewing post in OverGlow 2: Night (DEMO) comments
You can join the discord and send it in there or send it to my e-mail:
dip.sheet@outlook.com
If it's too large to send through mail then use wetransfer, and send it through there or as a link!
I reckon I'll make a little hotfix tommorow for that dreaded red box area just to add a note there. That's 3 counts already hehe