Nice idea, really nice use of 3d audio, okay writing in the notes!
The whole encounter sequence however is not that great, i literally kited him for 5-10 minutes, died 2 times, got him stuck in the vent chamber, before i understood that you could just double click on the elevator for it to arrive. And here i was waiting for it to open it's doors automatically.
That was pretty annoying, but other than that - solid stuff!