Signal...
That is... quite the theme. Not one I was hoping for (the wrong tool for the job was the one I wanted), but it's pretty open so it'll be fine. Probably.
I've already cooked up a few ideas, all of which are puzzle platformers though, so I'll try to avoid those since they are quite over done. I really like idle/incremental/factory games (though the latter is probably too complicated for the scope possible in a game jam), so I'll try getting an idea with one of those.