So there has been some press that's released around the game and the developer today.
And there's an awful lot more at the link below, well worth a read if you even have a passing interest in the book and what this game might be. If it all comes together it could be something pretty special.
Ideally, I'd use a management sim/city builder-style format for an adaptation, like Rimworld or the upcoming Frostpunk, and gradually change your options as the story progresss to mirror the descent into fascist regime
Maybe with a text adventure/interactive fiction element as well