The TENSE I can't emphasize that enough.
At some points I had to turn my head especially after that first jump scare.
The tight corridors contrasted with the big creature also helps to hold that scare factor. He takes up the entire hall and a big chunk of room.
I love the atmosphere, and how just uneasy you feel the whole time.
Please make more.
PS. Sound design is dope as well.
GGs :)