It needs a real plot!
The animation was stunning as always, but if you're going to put this much effort into an animation, you should bother to give it some kind of plot and sense of continuity. Go on!
Also, the mixture of art styles made the whole thing feel a bit odd in places.
Keep it up with the whooshy backgrounds, though. I love those things. I wish I could make mine that good. The narrator is funny, too.