I must be pretty stupid, because I didn't understand the story/metaphor here. I even rewatched it twice, but I don't see how "birth" relates to Humpty Dumpty breaking in two and some little black thing jumping up into the clouds to become a bird. The bird could be a stork, I guess, and the black thing could be a sperm, but I still don't understand.
On to more technical aspects, I liked the animation of Humpty Dumpty getting ready for the dive - rubbing his hands, etc. The character animation on the whole was pretty good, though I didn't understand why one audience member was rubbing another's head. The choice of music was good.
Err, that's it.