Very creepy, although it may have been better if you could only see the monster when he starts getting closer. I wasn't able to play very long because the slowness of the movement and the clunkiness of the controls started to grate on me, but if it had been a bit more refined I could probably play this for a while. Very spooky atmosphere.
Besides the controls, the one problem I had was the footstep sounds. There were too many, nd they went on long after I had moved, which sometimes led me to jump the gun and get killed. There should only be two quick step sounds, the same number of actual steps shown in the animation. Besides those minor gripes, it was a good, fun, and spoopy entry.