I just started creating "Yoshi Flash" game. Its made with Flash CS3. And has so far 79 lines of scripting.. Its not done yet.
Here is a small example of the scripting i used while programming the game..

onClipEvent (enterFrame) { //This makes sure that the following actions will be repeated every time the game enters the frame this character is on.
_root.tiredness -= 0.01; //so, every time the game hits this frame the tiredness variable wil be reduced with 0,01.
_root.hunger -= 0.02; //and this variable will be reduced with 0,02
}//end of onClipEvent's block.

onClipEvent (enterFrame) {
if (Key.isDown(Key.RIGHT)) { //when right key is pressed
this._x += 5; //this movieClip will move 5 pixels to the right.
}
if (Key.isDown(Key.LEFT)) { //when left key is pressed
this._x -= 5; //this movieClip will move 5 pixels to the left.
}
if (Key.isDown(Key.UP)) { //when up key is pressed
this._y -= 5; //this movieClip will move up 5 pixels.
}
if (Key.isDown(Key.DOWN)) { //when down key is pressed
this._y += 5; //this movieClip will move down 5 pixels.
}
}

onClipEvent (enterFrame) { //This makes sure that the following actions will be repeated every time the game enters the frame this character is on.
_root.tiredness -= 0.01; //so, every time the game hits this frame the tiredness variable wil be reduced with 0,01.
_root.hunger -= 0.02; //and this variable will be reduced with 0,02
}//end of onClipEvent's block.

onClipEvent (enterFrame) {
if (Key.isDown(Key.RIGHT)) { //when right key is pressed
this._x += 5; //this movieClip will move 5 pixels to the right.
}
if (Key.isDown(Key.LEFT)) { //when left key is pressed
this._x -= 5; //this movieClip will move 5 pixels to the left.
}
if (Key.isDown(Key.UP)) { //when up key is pressed
this._y -= 5; //this movieClip will move up 5 pixels.
}
if (Key.isDown(Key.DOWN)) { //when down key is pressed
this._y += 5; //this movieClip will move down 5 pixels.
}
}

Thats is only 1 quarter of it... NOT EVEN..

// The game is about, 2 young yoshis wake up, and find themselves in a different galaxy.
You have to adventure the different planets, and fight the evil Browser.
Its like Mario Galaxy for Wii.
Its a really fun game so far, and i hope u guys like it more than i do.

Interesting codes that is made for movement.

=)

Remember people there are 2 ways of movement what I know of.

Angled Movement and Scroll Movement.

Angle Movement for an example
A = Angle (Radian Value, to convert from Dec to Rad: A * (PI / 180) and to convert from Rad to Dec: A * (180 / PI) )
D = Distance, how far will you go?

Remember Sine is 0 and 180 Degrees and Cosine is the corresponding sine that means it's 90 and 270 degrees.
X = X + sin(A) * D
Y = Y + cos(A) * D

Scroll Movement is like this:

D = Distance, how far will you go?

X = X + D
Y = Y + D

yeah, i know. Its cool to know that u know too!

And what is this Yoshi game is about?

Can't wait to see what you made! =D