It was pretty easy to tell that you used some other source for the sound. It just syncs too well. It's awesome that you have this great animation. It perfecty fits the mood. I like how it gets darker as it goes along. It just shows good pacing.
Everything just fits together so well. You certainly don't know what to expect in this. I love your sarcastic author's comments. The colors are nice and vibrant. I like how it goes on a long time.