The mode was made by Fearless Kat. Webpage for the original workshop is here : https://workshop.codes/VE9TP.
I just figured out a neat effect and thought it fit the visuals of the workshop (monster being blind/ using echo location), not sure about the gameplay.
This post utilizes other codes either in part or in full. This could be because they remixed them, used parts of them, were inspired by them, or other reasons.