One game built out of one museum photograph: a Hellenistic sleeping-satyr fragment becomes the set for a single night in a dark gallery, played with an SVG character and no dependencies or external assets at all. Whatever it turns out to be moment to moment, a zero-star art experiment grown from a single artifact photo is exactly the kind of thing no marketplace was ever going to surface.
If you only play oneretro soccer— 11-a-side low-poly football with a live commentator is the most pick-up-and-play thing on today's slate, even if you don't speak the language.
Passed over a wall of interchangeable idle/clicker RPGs from the itch firehose, brand-name fan games, Minecraft and tic-tac-toe rebuilds, and a couple of SEO spam repos wearing 'game' as a keyword.