Quantum Mechanics Toys that Didn’t Catch On

Or even more quantum games here: https://github.com/stared/science-based-games-list

No quantum equivalent of minesweeper for nukes? (probabilistic, with tunneling)

Greg Egan wrote a story ("Border Guards")in which post-human players play a game of Quantum Soccer. Being Greg Egan, he actually created the game in Java.

http://www.gregegan.net/BORDER/Soccer/Soccer.html

I wouldn't call it accessible, though.