Well, if the airbace concept was to be improved, I would suggest to add useless details, like :
- An useless gas station. No cars on the Moon.
- Useless decorative helium balloons, sadly lying on the ground (heavier than void).
- An useless gliding school. Here you would learn to takeoff from a lunar cliff and refine your ballistic crash trajectory (on the lunar serface).
- An useless square with an useless BBQ. Even if you manage to light it with some chemicals or a LOX bottle, you will have an hard time bringing the meat to your mouth. Visors have their limits...
- An useless bridge to practice bace jump.