Thank you for making & sharing this, I love it! It works perfectly with some models I have tried but others don't seem to load properly - the mesh texture fields show up in the options menu but nothing is visible in the viewport. I don't have much experience with glb files so I don't have any guesses as to why that is.
I think the only other problem I noticed is due to the way gifs work rather than the tool itself: sometimes colour reduction algorithms assign non-ideal hex numbers so you end up with noticeably flickering hues - I don't know how feasible it is to add different algorithms similar to how saving gifs in photoshop works, but that would be a really good feature imo.
As for other features: visual filters would be a fun way to add to the retro effect - scanlines, vignetting and chromatic aberration are a few that come to mind, anything that gives CRT vibes.
And np, I really appreciate your work! I've been on a years-long quest to find good hedge maze models so I was thrilled when I discovered yours lol, and seeing this released was a nice surprise because it's exactly the sort of thing I'm into. Good luck with your future creations!