In its core, I think the concept was interesting. I always appreciate when fan mission creators think outside the box and come up with a non-stealth based mission. Too bad, the creator here had either a questionable concept about how to design an adventure game, or just didn't have enough time/motivation for doing so. The mission is sadly filled with pixelhunt/keyhunt moments which make the experience rather annoying. Not to mention there is no proper conclusion, the mission just ends at one point (probably where the creator felt that was all the effort they could put into it).
Besides these, the map is completely fine, the creepy atmosphere was implemented pretty well.
Overall, I think the effort is appreciatable, too bad it couldn't really come together.