In techniqual terms, it IS a movie
I found this flash pretty interesting. I suggest adding much, much more and adding incremental maximum angles (First segement max angle 5, second 10, 15, 20, etc.)The trunk frankly, was bent like a contortionist.
You can make leaves fall once in a while, add a weather feature, animal encounters, items, and a score for how large your tree is before it gets cut down or whatever, status ailments that cause the tree problems or benefits, and maybe even the ability to make generations of trees to speed up your scoring!
Why is this actually considered a movie? It is because in general terms, movies lack interaction and your flash had that feature. Your flash is what I call an actionscript movie.