It's a rather simple design: have teams of jump-jet soldiers fight as they fall in a purely vertical map. More specifically, elite ARC troopers and jet droids battle in outer space, just above Mustafar. When they reach the bottom of the map, they fall through a portal and reappear at the top of the map once more (or they miss the portal and die). For fun, the area is filled with asteroids that can kill you if you land on them hard enough. An important feature is that they don't all fall at the same rate (with jump jets on, that is), so the distance between units is never constant.
Here are the two teams:
red: soldier - award rifle, time bomb, rifle, commando pistol
orange: demolition - rocket launcher, bulldog, flamethrower, detpack
yellow: sniper - beam sniper rifle, rotation control, sniper rifle, sonic blaster
green: medic/technician - award shotgun, healing, shotgun, ammo fusion cutter
blue: officer - chaingun, autoturret, han pistol, rally
purple: special ops - arc caster, shockfield/neuro poison, bowcaster, wrist rocket
brown: infiltrator - stealth, reprogram/mind control, incinerator, suicide bomb
gray: swordsman - lightsaber/electrostaff, shield emitter
black: commander - award pistol, team teleport, invulnerability, rage
white: fleet admiral - beam pistol, orbital strike, remote droid, award rocket launcher
Some of these are new, LUA-scripted weapons.
Here's a short video of some gameplay and features.