Saw a few good videos from the contest, but this is without a doubt my favorite.
For some reason I think of jello every time I watch this, and I think a lot of it has to do with the sync
(and the bounciness and colors). There's literally not a rough cut in there. It flows so damn well.
I agree with TPS on the kaleidoscope analogy.
I like to think of sync as a personification of the song-- smooth transitions is necessary, but the correct clip choice is even more important, because it's necessary to have that motion. That's where the editor comes in and decides how to interpret the song by using a certain motion, like the wave of a hand, or an explosion, or even a static scene, whatever. And so I think your interpretation of the music was perfect. No complaints, at all. I notice you're pretty good at this anyhow, though.
You also added effects in there, but they weren't the typical ones that sat on top of a clip-- rather they manipulated the clips and helped to personify the song. Though the color correction helped add to the atmosphere, and I really liked that as well.
And I don't know much about this contest and if you were given the song or whatever, but the song and anime are well suited to each other to begin with, I would think. Any editor could show that, but it takes a unique approach and interpretation to actually bring it justice and make it entertaining, and you did.
One of the few videos I've seen that I'd give a 5/5.
god you're gunna be such a cocky bastard after more peoples see this