definitely flesh it out via book and design documents. and visaully, aswell. I got Flesh pit vibes https://www.mysteryfleshpitnationalpark.com/ . Definitely improve upon this concept. it is worth it in long run.
I love mystery flesh pit so this is an awesome comment to get ((: another pit-based setting, even if it's very different haha
Would be fun to expand the worldbuilding (many aspects of the setting that haven't been explored enough in-game) and maybe make some visuals for it, though not sure if they'd be canonical - player's imagination has to come first.