Seems like a good way to teach about sub-pixel rendering and HighDPI. Perhaps abstract so the screen is an addressable pixel (so as not to break the world), divide each virtual pixel into, say, a 4x4 submatrix (or even 8x8, 16x16, etc), and have new (prefixed?) functions that work on the sub-pixels (which ideally map 1:1 to actual screen pixels). For back compat, address pixels with two offets..one in the virtual grid, and one for the sub pixel.

I've been working on a fantasy console for several years now that is essentially that: a sort of "16-bit" scale version where PICO-8 is more "8-bit" scale.

No idea if it will ever see the light of day, but it's been a very therapeutic hobby project.

Is it opensource? I'd love to check it out.

It isn't.

I love open source: my two books are open source, I work in open source, and almost all of my hobby projects are open source.

But after spending all day coordinating with users and combing through the issue tracker, there's something very relaxing to me to have a little project where I don't feel "on stage" whenn working on it. It's good for me to get a social break.