The controls being on a separate window mildly annoyed me, but other than that, the game was fun. It took me a second to figure out that I had to click on the header text to select the difficulty.
I like the use of sound, and the zoomed-in POV really limits your peripheral and keeps you on your toes. It was also quite hard, but for a short game, I think that makes it last longer. I still haven't beat it, but then again, I've only tried on the hardest difficulty.