Huh
I think it need a little more suspense because it seems a bit pointless. If a killer kill someone for no reason, it's good to crap our pants before the victim dies. Maybe the music was the problem...
Graphics also need some refinement. Serious flash have more impact when they look somewhat "realistic". Also play with the darkness, again, for more suspense.
Other than that, good work. You're on the right track!