PC Input to Android

Hi! I made a Pong game, and right now its for PC/MAC/LINUX standalone. I would like to convert the controls to android/touch, but don't know how.. I am not that good with coding, and I also have a Main Menu that when you click on the 3d text, it will load a level. It is made with the new unity 2D Tools. Thanks!!

Scripts:

 //MENU BUTONS SCRIPT
 
 var levelToLoad : String;
 var soundhover : AudioClip;
 var beep : AudioClip;
 var QuitButton : boolean = false;
 function OnMouseEnter(){
 audio.PlayOneShot(soundhover);
 }
 function OnMouseUp(){
 audio.PlayOneShot(beep);
 yield new WaitForSeconds(0.35);
 if(QuitButton){
 Application.Quit();
 }
 else{
 Application.LoadLevel("pong");
 }
 }
 @script RequireComponent(AudioSource)



 //PLAYER CONTROLS
 
 #pragma strict
 
 var moveUp : KeyCode;
 var moveDown : KeyCode;
 
 var speed : float = 10;
 
 function Update () 
 {
     if(Input.GetKey(moveUp))
     {
         rigidbody2D.velocity.y = speed;
     }
     else if (Input.GetKey(moveDown))
     {
         rigidbody2D.velocity.y = speed *-1;
     }
     else
     {
         rigidbody2D.velocity.y = 0;
     }
     rigidbody2D.velocity.x = 0;
 }