Very well done. I liked the vibe and it really felt like you where in this weird warehouse, well done with the world building. However, after about 20 minutes for looking around the whole complex, I did not manage to find the code for the keypad. It would have been a good addition to scatter hints around, or have a hint system, that would tell you roughly where it could be. I did not enjoy running around and try to find it. Also, I didn't really understand the meaning behind the microphone and audio level and how it would effect gameplay. I understood that it effected the light you emitted, but otherwise it was unclear if I should be keeping quiet, or if I was free to scream without any side effects.
Anyway, very well done, I also love the shader you used it makes the visuals really unique.