I just beat this game.
Wow. Only game that's made me tear up this much is Torment, and... Some parts of Grim Fandango, if I recall correctly. That was one amazing story, with really memorable characters and excellent writing.
Now... A preface, here. There's really not much in the way of 'gameplay.' I hear that there are some really choice-and-consequence laden moments, but from the way I played it, it seemed really linear; though, I understand there are three possible endings, so, I THINK I got the best ending, this playthrough.
There are a few parts that seem really out of place - because it's mostly a pixel-hunt adventure game. One part was particularly hilarious for Codexian reasons, but seriously out place - there was a game of Whack-a-Mole that you played with the mouse to progress through the story. "What's whack-a-mole?" one of the characters asked, and was answered, "It's what people used to play instead of FPSes."
I think it was worth it for that little jab at FPS gaming, but, still, it stuck some out-of-place gameplay elements in what was essentially a visual novel.
A really, really good visual novel, but a visual novel nonetheless. No puzzle solving at all in To the Moon, and it seems unfair to judge it as a game, because it's not *really* that much of a game at all.
BUT... It is fucking excellent. The comment of "this really advances the medium" strikes me as a little over-the-top and exaggeratory, because it doesn't have anything to DO with the medium of video gaming, but it does show just how good video game writing can get.
I think I might stick it on my list of favorite adventure games, actually. Really, really beautiful.