I didn't really find it all too scary. At first I was a bit uneasy about being follow and the static shocked me at first, but then after the first time of being caught by the man I really wasn't scared anymore. The only reason I kept playing after the second time was because I really wanted to find out what happens when I got all 8 notes.
I wish they made it somewhat more like Amnesia so that you can throw something at him or something to disable him for a second possibly or something. Whenever I got curious and ventured into a building I risked an extremely high chance of dying. Maybe a bit more puzzling to, because just walking and running around gets boring after some time. :P