Honestly, that was pretty captivating, although I didn't manage to get past "her" even a single time. Either I was doing something wrong, or "she" is just too fast.
Also I beleive the game would win from some additional sfx and creepy music; not something that would blast full-time, but occational rustle or creak, as well as some screeching melody while you're being chased.
And it would be nice to have some items, such as blinking monitors or scattered pages, which would allow to peek into this world's lore.