Post a reply if you're building for this jam, and if you'd like, a rough idea of the type of game.
My concept right now is a space invaders or Galaga style game, of course with no graphics or audio, just pieces of text flying around!
I did some work on a text-based RPG as part of Hacktoberfest on GitHub a couple of years. It's an interesting concept, but does take a lot of effort. And that's just considering line-by-line text, not trying to draw anything with text itself.
Anyway, I'm going to keep working on my idea here. I see there's a submission already, so it's time to get moving.