Just got to the end with a buddy. This is a great map! Especially for your first. As far as what we liked:
- The length of the map is very impressive
- There was a great variety of locations to go to within the asylum
- I personally liked the environmental storytelling with the people who lived in the vents, and made your map very memorable from the countless other asylum maps
- The story with the demonic entity was very well paced. The ending was surprising! Very well executed
-We liked the big reveal with the demonic entity where all the lights get cut out and then you see the entity itself at the end of the hall

We have some general suggestions:

- There are light sources without any obvious light bulbs, light shafts, etc. Having them could improve the immersion of the map
- The atmosphere isn't very creepy as it is. I didn't really feel tense at any moment of the game. This could just be because I was with a buddy though, but a creepy atmosphere could really help
- The keys honestly don't look that great. A simple custom model that you can pack into the level would be the way to go
- Putting the level name into the description near the top would help people in the future


Now as for specific parts of the map:
- There's a jumping puzzle where you have to avoid two spinning traps. We found a soft lock near the edges of those fans.
- The jump scares aren't very well made I subscribed to this map knowing full well there would be gmod level jump scares but you could improve them by adding tension and build up leading to it. Disturbing sounds, lights flickering, anything to tell the player that something is coming
- There's alot of vents. I mean, alot. Some variety would help alot. To your credit, they are short, but still.

I'm part of a gmod mapping community on discord. We run contests here and there for fun. If you want you can join and share your map! I'm sure they could give you some good feedback too. https://discord.gg/9qjPWQg