I think I figured out how to explain it:

I basically wanted to make a much more usable pico8 for game prototyping. Hence the 320x180 design, and this prototype: https://90s.dev/v1/ But I also wanted the full convenience of VS Code, including full type checking and autocompletion support for TypeScript. So I designed it to be a platform that can be used to make and publish the things that pico8's tabs contain.

Now I see that I released this much too soon.