Nice overall work...
I really appreciate the fact that you attempted to create much more detailed backgrounds and images to bring your animation to life. The animation itself and the story are quite good, but I need to make a suggestion. For the more complex images, it appears as though you created them in a raster-based program such as Fireworks or Photoshop. Thus, the resolution goes to shit when imported into vector-based Flash. This makes it apparent what is done in Flash and what isn't. Next time, try using vector-based Illustrator or FreeHand and you very well may get better results. Nice job and good luck.