Stylish, But Poor Graphics
The music went with the action wonderfully, the idea behind the animation seemed cute, fresh, and original, and you pulled it off generally pretty well. Unfortunately, I really had to dock you on graphics. The graphics looked far too simplistic, with little detailling or work with light and shading. Instead you relied on gradients and basic colors, which reduced the quality of your art.
Also, the animation sometimes left much desired. You animated most of the action without flaw, however you resolved to simply flipping the character images like pieces of paper a few times, and it looked pretty terrible.
Put some more effort into the little details and you'll have a much better piece.