Brilliant Artwork
But you need to animate a bit more.
Something that can make it seem less slow is to have more going on at once. If people can see an obvious tween go on for more than three second, they get bored.
A simple fix during the parade bit would be to add the streamers and glitter that's often flying about. Just make one symbol that repeats itself, and place one instanceon a layer in front of the balloons, and one behind, slightly reduced in size. It'll add depth, make it look busier, and keep people's attention longer.
Sound would always be good. By the way this is sort of cut off at the biking bit, I assume it wasn't finished anyway, yet.