This is such a cool world building and exploration game! 

I think that the idea of building a map and metaphorically turning over the "stones" is so so genius. I'm absolutely going to incorporate it into other games I run or create so that the players have more buy in and natural curiosity. 

My only critique is that I wish you had somehow woven in the backstory of the crumble and recreation of society more. It felt like an element that could have been further reinforced somehow because as it stands, the game is the same with or without that framing.

Anyway, love this so much!