Maybe a little too much at once
Off the bat, I gotta say you're very skilled at what you've done. The graphics are excellent, the atmospehere, all great. However, for me at least, as a slightly jaded individual, I simply think there was too much happening at once. Maybe it was the fact that everything happened so fast, I can't quite place it. Events sort of melded together and there wasn't really an _impact_ of fear. The music didn't really help this either as it just kept going and going, and it was very subdued. There's a lot of potential in the music as it is now, but maybe make it a little more sinister and let it do its' thing and just take it easy.
Maybe slow things down a bit and don't be afraid of using some silence here and there to heighten the sensation of fear. Put a pause in here and there to let the viewer work him/herself into a state of fear of what will happen next.
All in all, keep up the great graphical work but maybe just chill a little.
W00t!