I'm participating in another game jam, this one Shape Jam II, in which we make a game using only basic shapes (but make it moddable so that artists can replace the artwork and sounds in part 2).
My entry is Mod-Con, a hex-based matching game.
It's not quite done yet, but I'll be finishing it soon, because the deadline is Friday! 😬
(As always, feel free to hit Ctrl-C and inspect the code.)