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: I really liked that you added a mood board to establish visual style. I LOVE that you included this description of integrating this game for Twitch streaming! I think it's a popular and fun option, and I think that would make this game 1000x more playable/popular.
Weaknesses: I think given the length of the doc, you could have found ways to make this more concise. There are a lot of sections that don't have a lot of information written or you describe a section as not applicable or that you don't know enough about it. It might have been better to consolidate formatting or eliminate sections that were not relevant. I also would have liked more diagrams. It's a document, but diagrams are super instructive and can eliminate large descriptive chunks, while getting the same info across. This would be especially helpful when discussing core loop or other technical aspects of the game.
There is some uncertainty in the document that ideally would have been resolved before submission, such as what the actual genre was meant to be. I think from a technical stand point, I would need some further clarification/meetings to figure out how we wanted to implement this game. I also (personally) didn't like that the document was sometimes written in first person, but this is absolutely my preference, I don't know how many people would care about that detail.
Overall, I think this would be a fun game to play!