Very nice and innovative game. If I had one complaint, it would be that waiting for all the messages to appear when you go back or restart can get a little annoying, so a way to speed up messages when you go back, or just going back directly to when the choice is presented (or even having a choice tree) would be nice.
And maybe, just an ambitious suggestion, but you could perhaps turn this into a full game, and incorporate the story into its multiple endings instead of having it as a separate post. That would be very hard to pull off, but if you do it well it would certainly make for an excellent game.