Great submission!
Environment looks well built. Mood lighting is very well done. Death animations are all satisfying, makes killing the test subject that much more fun. Camera work is very good too, very smooth and a good way of telling the player what they have done when they pressed a button.
Difficulty level felt just right, although I got a bit confused by one level where you have to jump over the final door (I assume I did it right). I played it until completion.
For improvements, I found a couple small bugs, mainly the repeating death animation under the saw blade, and I think when you go onto a moving platform and start crouching it doesn't move the player on top of it properly. I'd also suggest tightening up the dialogue a bit; a couple of the dialogue sequences dragged on slightly too long imo.
Other than the minor points listed, a very strong and polished submission. Congratulations!