There are a bunch of submissions and I wanted to give feedback to everyone, so I'm going to list some strengths and weaknesses that I perceive from the GDD's in this challenge (take with a grain of salt, I recognize the challenge this jam theme + time limitations, especially during a holiday weekend).
Strengths: This document gets a good examination of all the important thing. This honestly is a really good doc for a pitch, in my opinion. Overall, really clear, lots of images and several diagrams to break up the text and express different ideas.
Weaknesses: There's not a lot of information that specifies how the gameplay feels. There's a good overall idea of the game, but you've also included a list of gameplay elements that aren't explained in your core game loop. Some examples of these elements (combat, exploration, scavenging, and puzzles) would make this very difficult to find issue with.
Overall: Cool concept, could use some more fleshing out in its mechanics. I would absolutely play this for countless hours.