I think the most literal reference to the theme in my game is the 'simple' monster BUT I like to think there's another one: the way surroundings are rendered! I've implemented projector-like scanning mechanic that takes screenshot and renders it on objects, creating creepy, distorted and *aberrated* (lol) visuals
Here's a link if you wanna try
https://shy037.itch.io/find-it-before-it-finds-you