Side note: Mini Metro is an incredible game, and the studio is still updating it with new content a decade after release! I highly recomend everyone here checking it out if they haven't already.
Sorry if I wasn't clear. Mini Metro is a game that has the player connecting metro stations together by routing them however they see fit. It's a minimalist network/graph game that's both relaxing and challenging. It uses loose approximations/abstractions of real world cities.https://dinopoloclub.com/games/mini-metro/ (highly recommended!)
I'd love to see a web map version of it based on real geography.
(Not affiliated, just a fan)