Y'know, somehow that didn't even occur to me at the time...?? But yeah, in hindsight it seems like an obvious comparison... honestly, at the time, I was mostly frustrated by the way it felt like he was keeping a joke from me.... I can't explain that feeling, but it was clear as day, though it's mostly evaporated now that I've seen exactly how little there is to it. I guess the difference between this and a game is that I had no indication of whether I was "doing it right" -- I might miss something, and forever be behind on XKCD jokes that everyone else got. I dunno...