I see the term "tech demo" used derogatorily often, but it shouldn't always be an insult. Sure, if a game is 60 bucks and uses a half-assed gimmick, it deserves to be called out. But for bite-sized $10 experiences that are fun to play for a few hours, an afternoon of light fare isn't the worst thing in the world.
Bazaar is basically the definition of that concept.