Amazing.
You obviously are extremely talented in animation, since it went so smoothly, and the artwork does nothing but set the perfect mood for this movie, even to the point where it can be considered as eye candy. Hell, this thing even made me let out a girly "Squee!", like ten seconds in, and the ending always makes me smile.
Any ways to improve? None that I can see. God, I can't wait for step three to come.