iPad touch scripting...

Here is what I want to do. I'm trying to make a script, or scripts, that can help me do these things:

Detects the player as he touches the screen.

When the player has touched an area, which is right above the intended moving character prefab, it does four things at once.

-Adds points to score board.

-Changes the animation for the character.

-Plays the audio file component.

-Increases the speed of the character that was touched.

I have made a script, but its not working at all. What can I do to fix it? I've looked around and found several different ways to do the same thing but they don't work either. Its getting frustrating.

My current touch screen code:

 void Update () {
     foreach (Touch touch in Input.touches){
         if (touch.phase == TouchPhase.Began){
             Ray ray = Camera.main.ScreenPointToRay(touch.position);
             RaycastHit hit;
             if (Physics.Raycast(ray, out hit)){
                 hit.transform.SendMessage("Selected");
             }
         }
     }
 }