As you go through the different states of the world, things will change in ways that fit with where you are. For instance, that acid pit is now boiling in the fire world and bubbles of boiling acid are flowing up into the room. Maybe in the ice world it'll be frozen over and completely harmless, maybe in the darkness world the room will be pitch black and you'll fall into the acid by accident! Who knows!
Currently working on: Advancing the story
Time spent on the project so far: 142 hours
Screenshot after the jump: Bubbles!