It's odd, but the eyes on the wall at first were disturbing, but as I played they almost became a comfort, knowing I wasn't completely alone down there.
Assuming it was the goal, I fell as far as I could until I was trapped between 4 locked doors. I was almost glad to just lose and be done with it. Not "terrifying" but nothing I'd want to play for more than a short while without a break (though it clearly has addictive properties to it).
Reading some of the comments (plus the title) I assume the game is endless, or is at least it's one of those "Slender" type games that gives you an addictive puzzle to solve with little reward for solving it. This isn't a bad thing, just not something I enjoy at length.
Good Game though.