I've enjoyed it so far, but for a moment got lost when reaching the office, basically gone out the red door to the entrance, and the greeting event repeated. Probably the event is not being disabled after happening(?).
Also, i might have missed a hint or something, but didn't know that the "phone" was by pressing ESC, given that there was so many interactable objects, I've been searching for it around the office.
The other thing I'd like to suggest like Alpaca Rider mentioned, would be the addition of a crosshair kind of pointer, to help with aiming.