1. must use game maker Studios
then
5. You can use whatever game engine you like (Even homebrew!), as long as the final result looks like it could run on a Playstation 1, Sega Saturn, or the Panasonic 3DO if you're feeling fancy. Think 240p, 4:3 aspect ratio, extremely lowpoly, low rez unfiltered textures!
lol. Very low effort jam. Would have been down for a good ol gamemaker jam. owell.