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You already seem interested, and it is free, so that is a pretty good reason to get it. Beyond that, this game effectively melds its themes and mechanics. By that, I mean that most games uses techniques from other media (be that music, film, literature) to get there themes across, and the gameplay is just sort of there to be fun (See: Uncharted, almost all other games). In this game, the theme is conveyed through the mechanics of the game itself. To me, that makes it a cool game, but the theme is sort of on-the-nose, and you might not find playing it to be a 'fun' experience.