Seeing as how this is your second animation, I went back and watched your first one.. Just wanted to see if you had made any improvement. Unfortunately, your not showing much progress. My advice would be to experiment a bit more with frame by frame animation. Tweens are great, but only when used correctly.. For example, the shape tween you used where the "unfortunate boy" got pecked to death..That could have looked MUCH better.
Keep trying! I look forward to see your next one. If you ever need any help, please let me know.
Thanks for the advice! :)