First comment: You do not have to delete the onMouseMove after each hit test, you can just have the hit tests listed in sequence.

I.E.
code:


//...SNIP...

this.onMouseMove = function(){

	if(_root.pin.hitTest(_root.r_balloon)){

		_root.r_balloon.gotoAndPlay("popped");

	}

	if(_root.pin.hitTest(_root.b_balloon)){

		_root.b_balloon.gotoAndPlay("popped");

		_root.b_balloon._visible = false;

	}

	if(_root.pin.hitTest(_root.g_balloon)){

		_root.g_balloon.gotoAndPlay("popped");

	}

	if(_root.pin.hitTest(_root.p_balloon)){

		_root.p_balloon.gotoAndPlay("popped");

		}

            }

}

//...SNIP...


Or you could use an if else chain here.

However, to make things easier, this is where you would use For loops and concatenation.

First, rename your balloon movie clips to:
balloon_0
balloon_1
balloon_2
balloon_3

Next you would set up a for loop and use concatenation to check each
of the balloons.

Concatenation is the operation of joining two character strings end to end or a string and variable.

In otherwords if you have this:
code:


var i = 0



_root["balloon_"+i]


is exactly like saying this:
code:


_root.balloon_0


You follow me so far?

Okay..here's the example:
code:


//...SNIP...

this.onMouseMove = function(){

//FOR LOOP CODE IS LIKE THIS

//for (starting number;repeat this until this condition is no longer true;how

//the number will increase.  ++ in Flash means it will increase by 1 for //each time through the loop.

for (var i = 0;i <= 3;i++){

	if(_root.pin.hitTest(_root["balloon_"+i])){

		_root["balloon_"+i].gotoAndPlay("popped");

	}

	

}

}

//...SNIP...