At first I was let down by the graphics, but the amazing story more than made up for it.
To be honest: the game is very, very easy and it is more of an interactive story than it is an actual game. Basically this means that you'll have to interact with certain objects/people most of the time for the story to progress and all of the objects/people are easily found. If you want an adventure game with a challenge, this is not your game.
However, if you - like me - play an adventure game for the story first and foremost, then this one is a must-have. I am not ashamed to say that near the end this game had me in tears. Not only is it a great story, but it is also a story that you won't see coming. Add to that a fair share of witty humor an you've got yourself To the Moon.
In fact, the first reaction that came to me when I had (almost) finished the game was: 'they should make a movie of this story.'
So in short: this is a game you don't play for the puzzles, but for the story. And what a story it is!