I just recently bought and played this while it was on sale. Loved this fun game! It doesn't try to be anything that it's not.
I was also compelled to press every typewriter I found. Normally it goes "ding!", and I move on. There is one typewriter in a room that you can only get in by crawling through the windows that does something different.
Anyone else found this typewriter and know what I'm talking about? It showed a sequence of images of gross/dead things. The sequence really reminded me of the beacon imprint that happens in Mass Effect 1 to commander Shepard.