The game is about out traveling across different realities a each reality has a different challenge. I need ideas for mechanics and quests. These are the realities I have come up with so far:
you could have some cave/ mining town who built their town in the mines and their tunnel collapsed and now there is no light so finding a way to bring light back.
cave town big city the atmosphere a small floating town turtle island the people live inside a turtle without knowing it the center a weird twisted reality where everyone thinks they are on the surface of the earth but are actually in the core.