I haven't played Cultist Sim, but I really love the kink, aesthetic, and presentation here! I could probably vibe with a full version of this that was a little less linear/storydriven and more mechanics or emergent-narrative driven, perhaps with a roguelike spin.
Though I did get stuck at about the library section, there's still just something satisfying about shoving cards in the boxes, and the parasite kink is a really good fit for the gameplay.