More Rooms!
Rooms written in Go, another room in JavaScript, and two more in Java. We learned lots as other people were able to try adding their own rooms, especially as some of them were trying to build their rooms while the Map/Concierge switch was in flight. Ouch.
In the end, I realize that my experience was different from what a new developer today would experience. We were building on shifting sand, they will be building on a more stable API set. Too bad for them; building on sand was its own kind of adventure game.