Hey, I really like the song, and the atmosphere it has to it.
I like the way you utilized these voices and then the piano; it gives it a bizarre dark theme to it.
The only reason you didn't get 5 stars, is because I think you should really make the drums heavier; especially the snare. I think that would've added more life to the song.
But it's a great work overall, and if it's made for the animation I guess you did a perfect job.