The idea is solid, the atmosphere is AMAZING, and the feeling of Isolation is VERY real.
That said, there is waaaay too much broken with this game. To start off, clipping. You can clip through so much of the environment. Secondly, After I found the uncle, I got up on the viewfinder mountain, and... that's where it all fell apart. I got on the sled, and that's REALLY broken. When you get off the sled, the character makes comments about the uncle again. When you get to the house in the backdrop... it's not really there?
You have an AMAZING idea, one that, if you followed through and really put your mind to it, would be a game worthy of paying $10, maybe even $20 for.