Wow! I haven’t read “The Lottery” since junior high. Great concept.
It looks like you have considered a lot of the requirements for the game in your design doc.
-One challenge I can see is creating the narrative, 3D asset, and voice for a large number of townspeople. I think it is doable but I feel like scope creep could become an issue here.
-I think the prototype will help you discover where to limit the narrative. Limitations help us find more creative solutions and ultimately better end products.
I look forward to playing the game. This is a great concept.