How about having more than just one rating system and one winner? You could declare an “Overall” winner for the best game, but then also allow winners for subcategories:
-Gameplay
-AI
-Graphics/Sound
-Technical Achievement
Also instead of either just using judges or just public votes, it could be a combination of both?
An overall winner is definitly necessary, but for a lot of folks, it might be cool, to put their game in their resume? There is no prize money, but if you apply for a job and can show off a “technical achievement award” for a game contest you entered, definitly makes employers be more interested.
Note: I always show off my games that I wrote during job applications and it’s definitly getting people to listen. Even though, the job has nothing to do with gaming …