I really enjoyed this game! Did not really know what to think for the first couple of minutes, but fixing up the shack was definitely satisfying. The thunder clap scared me a little bit.
I think you did a really good job with the audio on this - it all seems to be tuned very well.
One small thing that I think could make a huge difference - if the shack level/heat level/food level were shown throughout the game, the player would have some idea of what they are headed towards.
Great job!