It's a simple game in theory, but the atmosphere is incredibly compelling. The music really makes the game here, and the use of stock photos is so clever I almost feel like the game would be worse off with custom art. I got the feeling I was playing a horror game, even though nothing in the game is exactly scary on its own. It's more than the sum of its parts.
(I got 12 countdowns with 6 points at x2.89 speed. For some reason, I can't post the screenshot.)