This sounds great so far! The voice acting is top notch! It's well written as well. The background music is a good fit :)
The extra sounds, like the typing and the door adds a lot to the atmosphere.
I have a minor complaint: There's no issue with headphones, but with only the computer's speakers, I had to put extra focus into listening to the talking. I think that maybe the music could be lowered just a bit and the voices brought out, to fix this. I'm not entirely sure if that'd do the trick though. I'm sure you'll work it out to a point where it's all great and clear in the end though ;)
Good job!