https://www.pcgamer.com/bizarre-physics-puzzler-human-fall-flat-now-has-steam-workshop-support/

Human: Fall Flat, the game about throwing alarmingly physics prone little people around puzzle-oriented maps, now has Steam Workshop support. That means players can now create their own maps, their own skins, their own lobbies, and probably much more besides. 

These lobbies can support up to eight players online thanks to a 2017 update. The game has sold over five million copies at this point, which is quite astonishing for what many would regard a niche game. You can even have a nice nap in it, if you like.