Played this in a dedicated cab at Zapcon, the makers had a booth, they're trying to monetize it. Game is very fun and I think one of the owners of Starfighter's bought an upright unit for the collection.
Check it out, it's a great party game. I played with strangers and with friends and had a good time doing it. Early gameplay footage when they were building the cab.
Get it here (bottom of page):
http://www.dynamicentertainment.se/system/gravitrex/report.phpI'm downloading it now and will report back with playability, cabability, etc. The windows build is a bit different than the cab build (linux) that I messed with at Zapcon.