The demo is open to the eventgoers and lets you choose your destination. It's quite polished and a lot more advanced than "hardcoding to drive in a loop".
I saw a video from people in the car. The screen allowed them to pick between 2 different destinations. It’s not like they could just punch in any old address.
That's a pretty generous way to describe a ~20-acre geofenced, low-speed ride using a pre-mapped area in which they likely tested this out quite a bit prior to the event.
