It's one submission for everyone, this way everyone has the same chance at winning the yearly subscription
Clearly if you can create more than one, you can diversify for your risk and increase your chances of getting a piece closer to the top, yet most people will only find time to do one. So we'd like to keep it fair in that respect.
Judges are TBD, but it will compromise of 3 artists, sometimes also a member or two from the GA.net staff.