Good Lord, 80 for me but there is no way in hell I've played 80 hours in 11 days, A lot of that has to be AFK time, I did fall asleep with it running one of the nights there and have left it on quite a bit while I do other shit. I'd say 50 absolute max of non AFK time and even then that is a painful amount of time.
I will say, do not watch any speed runs especially this guy distortion2. Under an hour for the whole game and hitting just about every boss. Not only that but some of the toughest ones he breezes through. Makes me feel very old.