I remember running through the demo several times. It was an old black and white text-based (with a picture of whatever room you were in) adventure game with a very gothic feel.
You started in a locked room, and had to check a desk and under a corner of a rug to find the key to get out. I believe there were also diary entries, and someone called Emily that you had to find. Once you were out of the room, there was a lady ghost who would drift away, and if you caught her she would moan at you. You were in a giant gothic house, and downstairs was a room with a sepulcher in it that I couldn't get past (possibly because it was a demo).
Does that sound familiar to anyone? My cousin and brother can vaguely remember the game itself, but not what it was called.
Thanks!
Edited to add: The last time I played this was probably in 1996 or so, so the details are a little fuzzy and could be off.

).