I'm going to ramble a bit about this, so bear with me. Apologies in advance.
I am often asking myself when I'm playing a game with a story: "Does this NEED to be a video game?" I usually land somewhere in the middle, but generally, my answer is: "This COULD be told in a book/movie/TV show, but it's better told as a video game." There are VERY few exceptions to this, and this is one of them. This story could not be told as anything other than a video game, at least not nearly as effectively.
This is probably one of the cleverest uses of a "character creator" I've ever seen. I was able to scarily match up my character to my real life self, and that added SO MUCH to the immersion -- something no other medium could possibly come close to achieving. As a result, the choices felt wholly mine in a way that most other games, especially of this type, normally don't. Even if the minor changes in the beginning don't end up paying off, in the back of my mind, I know they're part of my character. Something as simple as switching the flavor of milk, for example -- probably leads to nothing, but I know that I, personally, prefer chocolate, and this character is me. Brilliant, brilliant stuff. I love it.
I also think your usage of the theme is the best I've seen so far, and will likely not be matched. It's obviously very meta and literal, somehow super obvious, but in a million years I never would have thought of it. I really quite enjoyed that.
My only nitpicks are, for starters, I think this needs to be refined just a bit. I got lost on how this world actually worked -- partly due to the distraction of making sure my character was JUST RIGHT, partly because there's a lot to take in all at once. There were also times when I felt like my characters was drifting from what I thought he should do, even with the granular choices. That's only the case because you did such an amazing job making me feel like the character, that even the slightest deviation really hurt. A lesser game wouldn't have this issue, so it's partly a compliment. None of this couldn't be worked out with a couple more passes.
With all of that, and with how lengthy and ambitious this whole thing was, I am extremely impressed, and only wished I had time to dig through it more. Very well done. Congratulations.