The old school black and white graphics are very well done - the mixture of perfectly straight lines and then sort of scribbled drawings together is deceptive. It those look like those old school text adventures from the 1980s.
The game ended for me when I went off to see the client - not sure if that was the end or not - it said "To Be Continued..." so I'm guessing that was it.
It was fun talking to the assistant and reading the mail - you have makings of a good story telling experience there.