Oh, it's in Elm. Cool! I'll definitely read the code later today and hopefully learn something. Did writing this reveal any interesting pros/cons regarding event sourcing in contrast to a stateful implementation?

Minesweeper is such a cool exercise when learning new stuff. A co-worker challenged me to write this crude implementation on a flight from Heathrow to NYC while I was learning Go: https://gitlab.com/joyey/kakkamiina