@jasonb added some updates to mempool space invaders today, and it got me thinking about some games I'd seen on nostr but hadn't yet tried out.
So here is one that's like a suped up version of snake. I haven't quite figured out how sats play into it, but it seems like there is some lightning component. Also, perhaps you can play against other people? Although there wasn't anybody else playing when I got on.
I think this fellow tuvok on nostr is the developer.