Score System?

I've been trying to modify this script, mainly line 10, so that every time I destroy a star sprite prefab I gain one point. But, all my attempts have not worked.

My Star Prefab is also being spawned through a gameController, but I'm also having trouble making a reference to GameController from my Score Script.

Here is the score script:

 var score : int = 0;
 
 function Update () {
  
     if (Input.GetMouseButtonDown(0)) {
        var ray : Ray = Camera.main.ScreenPointToRay (Input.mousePosition);
        var hit : RaycastHit;
        if (Physics.Raycast (ray, hit)) {
            print ("Hit something: "+hit.collider.name);
            if (hit.collider.name == "Cube") {
              score += 1;
              Debug.Log("Play again! :"+score);
              Destroy(hit.collider.gameObject);
              }
  
        }
     }
 }

Here the GameController script:

 var hazard : GameObject;
 var spawnValues : Vector3;
 var hazardCount : int;
 var spawnWait : float;
 var startWait : float;
 var waveWait : float;
 
 var scoreText : GUIText;
 private  var score : int;
 
 function Start () {
     score = 0;
     UpdateScore ();
     StartCoroutine (SpawnWaves ());
 }
 
 function SpawnWaves () {
     yield WaitForSeconds (startWait);
     while (true)
     {
         for ( var i : int= 0; i < hazardCount; i++)
         {
              var spawnPosition : Vector3= new Vector3 (Random.Range (-spawnValues.x, spawnValues.x), spawnValues.y, spawnValues.z);
              var spawnRotation : Quaternion= Quaternion.identity;
             Instantiate (hazard, spawnPosition, spawnRotation);
             yield WaitForSeconds (spawnWait);
         }
         yield WaitForSeconds (waveWait);
     }
 }
 
 function AddScore (newScoreValue : int) {
     score += newScoreValue;
     UpdateScore ();
 }
 
 function UpdateScore () {
     scoreText.text = "Score: " + score;
 }

How can I connect these to scripts so I can see the score add up with every spawned star that is destroyed?