Please please, allow the theme to be associated per room or floor? Floor feels like it would be relatively easy with no UI changes needed.
1st time to new floor, uses current theme, but after that, just save/load theme when switching floors?
Room would be even better but we imagine it would be much more difficult to implement, especially since multiple rooms can be displayed on a single floor.
Desperately want the new Halloween theme in one of our rooms, but other themes for others.
You'll need it when the overworld game comes anyway.