Huang showed us a very early (and aesthetically awkward) build of the Arena hub, but all the basic functionality was there, letting us naturally hop into games with the controller's poppy A button, and retreat from an app with the back button.
The app works as a game hub too, allowing the user to enter, exit and play games by navigating exclusively with the Atlas controller -- a console front-end, if you will.
We had a go on "Colors": under a time limit, you have to run the robot over the necessary RFID discs as instructed by the controller's LEDs, and then get to the hexagonal plate -- the "SFX Hub" -- to "deposit" the flags.