Simple but fun gameplay. It took me a while to figure out the "Home row", but other than that, I had fun pushing keys fast :)
I gotta say, that the sound was used really well- the breathing really sold the increasing tension, and the music was properly spooky! The graphics was ok. I liked the slowly appearing monster.
The atmosphere worked, but some additions would improve it even more. A "horror sting" when the monster appears, maybe some screen effect (like film grain)?
One more thing- this game is HARD. Unless being jumped by the monster counts as an ending I couldn't finish it. Never made it to 3 AM!
Over all- good game, especially for one created in just four days, and in a new engine!