Not a very good tutorial
I am an amature game developer (check out my game if you don't believe me :P) who works with actionscipt 2.0. As of now I'm learning how to use actionscript 3.0 using a book. In your tutorial you just give out some code snippets, what you should do is show us what every single line means, what we can replace to adapt the code, when we have to use what. For example, when do you use :void, and when not.
This might be good for research and people making simple games or who need a bit of actionscript for their movies, but this isn't a good start to making an actionscript 3 game