This may seem like a silly question given that it's called "Shadowdark Weird Tales Game Jam" but the Submission Guidelines don't actually specify - things should be for Shadowdark?
Yes, lol.
But hey! Market* it to the whole OSR! Let Shadowdark be the assumed ruleset, but if people want to adapt your module to some other rule set, great!*in the market of free things, of course.
