The problem with this is the validity of those scores. Platform Popularity is the main issue that will either drive down any game entry that doesn't run on the most popular OS or you run into the problem of people scoring based off the videos shown because they can run the game thus scores based mostly on how the game "looks" rather than the actual end result of the finished game after playing it.
I can't see getting away from actual judges with posted system hardware specs. You'd drive away all the new platform development and limit those that would feel it's worth competing.
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