Ooo, I didn't even think to look for a help.txt, so that one was on me for not checking.
It's possible that it was just on my side or Ren'py doing its own thing. I'm playing on windows, and I forgot that I did click out of the screen, so that could've caused the flash. I've seen weirder things happen when I minimize. But, I'm glad to see that it was just a issue on my end.
Honestly, I should've mentioned this with the review, but the fact that you got everything looking that cleanly was amazing. This type of pixel style( I wish I remembered how to call it.. 8 bit?) doesn't give you a huge amount of space to work with from experience, plus with only two colors you are under a harsher limit. The characters even had movement and emotions to them, which added to the appeal of seeing how they act.
The only last suggestions I have for the icons is to give them 1 or 2 more pixel space if possible. That way you can keep the original shapes, but the letters won't be attached and they won't be attached to the bottom. Or change them to simpler icons, though I would hate for you to have to do that because they do look pretty cool now that I know what they are.
Either way, now that players have the help guide, if you decide to keep them the same, they won't give the same trouble that I did.
I feel like I was the "user error" play-tester.
I appreciate you reading over the feedback and giving it some thought, even if you decide not to use any of it. Plus, I liked the feedback you gave me so I wanted to give the same respect back.