Thanks! I'm glad you like them. I should do some more.

Mao? Yes, I think I've heard of it, only it was called "Bartok" - there were probably many variations between what I played and you played, though (of course). But yes, that's commonly mentioned as a related kind of game, as is Calvinball. I think Nomic is a bit more intellectual, though - a rules-lawyer's game, so differently if not less irreverent.