A Dark Room is great! I started playing it a lot mid way through developing this. That and Universal Paperclips are the gold standards of minimalist web-based games.
And then, for the "happy 10,000 day" folks: https://hn.algolia.com/?q=universal+paperclips -> https://www.decisionproblem.com/paperclips/ but DO NOT CLICK THAT IF YOU HAVE AN ADDICTIVE PERSONALITY for just like "Multi Undergraduate Destroyer" it will "Oh, is that birds chirping I hear? Well, no problem, just one more click ..."