You've probably never played anything like this before and you'll wish there was more of this out there.
It's more along the lines an interactive 'retro graphics' movie rather than a game, but don't let that put you off. The story and execution is probably worthy of some kind of award.
Forget any opinions on the gameplay (not that it is bad, it's just not the main focus here). This is a touching story someone wanted to tell with an excellent soundtrack to go with it and that is all you need to know.
This gets a 10 because I havn't played a game with this sort of effect on a persons emotions since Final Fantasy VII. The kind of game where in 10 or 20 years you'll want to play it again because of the fond memories and respect you will have for it.
I'd love to see more games like this come along. This was 4-5 hours of my life that I was happy to spend on a game.
Edit: For some reason it says 6 at the top.. I give it a 10 at I mentioned above.