Nice idea, good art
The idea was decent, and the art was nice. While I don't want to sound negative in this review because I liked the movie, I would like to give some advice.
The animation was a bit choppy--especially the squirrel. I know it can be hard to animate little woodland creatures, but it would be nice for that to be smoother.
Some of the things were redundant, as has been said before, such as the offering food to the tree. It was funny the first time, now make her do something else ;)
Finally, I would suggest a menu or at least a nice-looking ending animation (you have a white screen with credits scribbled on there). A nice ending page would make this animation all the better.
Again, I really liked this animation, but there are some things to consider when you animate your next Flash!
Luke