Realms

Realms refers to the map you traverse in . You have to play through eight of these realms in order to confront the Big Badtm and save the... well, not the world, so much as the amalgamation of weird floaty islands that were left in the wake of the Boom.

Overview
Each Realm is randomly generated and no two are alike. While moving through the realms, you are constantly moving forward, picking paths, and cannot move back. As such, having a rough idea of where you want to go and when you want to visit a particular area (eg. forge) is normally a good plan.