Great atmosphere and theme execution!
For improvement:
- I would suggest changing the controls to enable strafing since every directional movement makes the player spin.
I think it's the game's weakest point and stops it at good keeping it from great!
- The interaction with the other survivors could also be tweaked, I'm not quite sure what's the correct approach but the feeling of them blocking the way every time I entered the room was quite annoying.
- The sound effects of constant stepping of all the group is also a thing that could be improved upon.