This is one of those Untold stories that has always stuck with me since hearing it, so thank you for sharing it with us.
Why I share this now is because I recently found a game on itch.io with a mechanic that made me feel similar to how I think Luminesther was feeling as she explored the Gunks
The game is RogueLight and as the name implies it is a rogue-like game with GameBoy style graphics, where you use your arrows to light your way through multiple depths of a cavern and if you run out of arrows, you are just in darkness, guessing as where you might be going. Its a pay-what-you-want game so definitely worth checking out.
P.S. Paeter if you see this post, I would also recommend this game for the Summer of Free