Wish I had seen this comment before. I didn’t see any obvious way to save so figured it’d be cached on the browser, but you lose all progress if you come back to the game after closing the tab. To be fair it is on the how to play card, but figuring it was typical command I missed it. It’d be nice to have a note come up at the start of the game or in the page description. (This is on me for not reading the how to play card as it is there, but it would be good if it was highlighted that the game doesn’t save progress as you go.)