Oh...
I kinda think that all of this if from Bit-101's tutorial section copy past job, but I will give you the advantage of doubt.
I think that you should explain what the scrip dose, the bouncing ball thing dose not teach people to make a bouncing ball it tells them how it is made and then they can copy past it into flash and think "wow I did this".
I do not think that this is what a tutorial should do a tutorial should teach not just tell.
Please next time you make a "tutorial" make it teach people how to do stuff, like explain to people what it is that makes the ball not go outside the screen when they make the bouncing ball.
-Mark