I don't expect it to win at TGA but really it should. Games like this elevate the platform of gaming. This game blended storytelling, gameplay, imaginative level design, and creativity in a way most games can't and won't ever try. The playing the levels themselves is storytelling and gameplay. The game is straight up a case study of the games as art argument.
I think the creative risk this game takes are ultimately why it is unlikely to win GOY. A lot of people won't try such a game or look at it and dismiss it an weird or something they'll pass on.