This was so funny. I didn't expect to burst out laughing, but when the typing got more intense, I did.
I really liked the sound design. When I first heard the typing, I didn't interpret it as typing at all, not until it got a little more intense and I figured out what was happening. I think that intentional misdirection is really smart. I love how you made typing sound like something else, specially when you get to send the "deliverable".
I really liked the writing. The lack of graphics was a total advantage here. It not only allowed me to fill in the gaps with my own imagination, but that play with the ambiguity of what's really going on was only possible with just text and sound.