I interpret it as “Don’t explain what the game is or what it could be”.
I’m leaving comments in my coe explaining how certain things work and why, but not with the intention of guiding the paths of future devs, just as a way to say “I made this relatively complex thing and it’s important that you know how it works if you’re going to make something with it”.
I don’t think that’s against the spirit of the jam. I have a few hours before I need to worry about that, though.