A good start.
I can clearly see the effort you put in this Flash. There are loads of tweens and it's a lengthy piece. To be constructive, allow me to tell you the two main problems:
- You need to use more symbols. Some characters just slide from place to place, obviously tweened. It should feel more alive, and this is achieved by adding a walking animation.
- The graphics are a bit messy. I think it'd be a good idea to add more detail like a bit of lighting and shading. Try to make it all look natural.