Not bad for a first animation
Considering that this is your first flash, it's not too bad yet it's nothing great. The art style and animation is fairly basic and the lips are really out of sync, but with practise I'm sure you'll be able to make that less of an issue.
It would have been nice to see some background image in there, regardless of whether it was stationary or had some animation of its own. The white background just made things seem too plain and gave the whole movie an unfinished feel.
Stick with flash, put more time into your work and I'm sure you'll get better. Just remember to do something with the background next time.