Porpentine's Twiny Jam has sparked off a multitude of tiny Twines, each using 300 words or less, and it has been a veritable education seeing how people use those 300 words.
In The Tiniest Room, the author opts for a minimalist escape the room game. It provides the bare minimum you need to know, yet has all the usual keys and combination locks that you might expect from an escape game.
What really puts the cream on the cake is the ending, and so, as the Chinese idiom says (no, it actually exists), the sparrow may be small, it's nonetheless complete (麻雀虽小,五脏俱全). A good exercise in what you can do with very little.