Loved the atmosphere and the snowy sfx on the background, I really felt immerse in the game. Loved the moment when you go to bed and hear some footsteps approaching and the next day you realize someone has stolen the codes. Liked the tiny psychological horror moment when reading some messages broadcasted, or when someone starts knocking at the door.
The only suggestion I can make is on the snowy background sfx, it felt really obvious when it started looping again and broke my immersion a tiny bit. It also felt a bit tedious when messages with very high or low frequencies appeared on the computer because I had to spend awhile turning the knob.
What a shame that the exit door was interactable from the beginning of the game. Nonetheless, I enjoyed a lot this game, top marks!