You have it. This movie was fucking choppy as hell. Like the other guy said, was this 5 fps??
But looking beyond that, I see that you actually got the sprites arranged right and it wasn't that bad, you know aside from the whole 5 fps or whatever.
The thing that brought my rating down was mainly the lack of a vcam and the choppy moving backgrounds that look like they were half assed while moving.
One thing you should do it look up something called a Flash Vcam. A Vcam is a square shaped symbol that you put in your movie on the top layer, if you make the vcam smaller, it will give the effect of zooming in, if you make it bigger, it will give the effect of zooming out. It's kinda like an easy way to manipulate the stage size.
You should look into using one of those for future animations.