Philip Rad­van has cre­ated an amaz­ing resource of FREE game related .fla exam­ples to down­load and use how­ever you like! This one gets two thumbs up from me. There are some excel­lent scripts under the effects cat­e­gory which I have per­son­ally used (non-game related).

Go check it out here:

http://www.freeactionscript.com/game-scripts/

Here are the AS2 links: (there are a few as3 scripts on his site).

Game Weapons

Effects Ani­mated

Effects Dynamic

Enemy AI Engine

Game Engine

Images/BitmapData

Inter­face

Math

Secu­rity

Sound