Whew. Your report was great to read. Really great. Thank you so much !
Regarding the interpretation of prompts. Well. I don't know to be honest. Generally, I use them to stir the story in a direction I didn't anticipate. I let it guide my ideas, my inspirations. I may have an idea of what I want to tell/play, but those prompts are here to derail it and surprise me.
Regarding the Three-Acts, it's more a design thing. I tried to have the three part of the game proposing prompts with different themes & tones. There's no clear separation of Acts in the game. It's all in the prompts, with the underlying themes changing.
Hope that helps.