Race, joust, and play CTF on hoverbikes. No punching, kicking or weapons allowed, though. (Yes that complicates things, but don't worry. The riders can't seem to stay on their bikes anyway.)
The new Unity UI is pretty good! Menus for the first public alpha are done!
Assuming the background will be animated, will switching the arena make the background switch to a mockup of the arena in question?
Good question! I'm definitely planning to do something along those lines once there is more than one track/arena to choose. At the very least, there will be a thumbnail image/screenshot of the track, but I'm not sure how much more elaborate I'll get with it.