omg, I'm so sad. That would have been my favorite category to see (or do) of all time. : D You know I'd be trying to do a whole super small scale scene, just one inch in total! But I get how that can happen. The first two contests I did I did manage to finish, but the 'opposites' theme I cast in my lot and then didn't get far. I only did as much as getting wood cut. I was building a small cabinet that was a forest on top lit with LED fairy lights like lightning bugs and inside the cabinet was a crystal cave. The idea was going to be 'above/below'. But I pretty much only built it on paper. The hinges and wood and sketches are tied up in a grocery bag under my bed XD Sometimes life gets lifey.
I hope we can redo that theme in the future some time though! It sounds awesome. Even if it weren't stuff in small scales, I was reading about the idea to do a satellite, but just on a small base. It'd present a real feat of design to see what kinds of large builds people would do on just a small area.