Unity Engine issue...

I made myself several scripts, one controls a timer, another is an spawn controller that uses an array. My problem is that yesterday all of my scripts were working fine but when I logged on today the timer won't count down and the spawn controller won't spawn clones anymore. What could be the issue?

edit

 private var startTime;
 private var restSeconds : int;
 private var roundedRestSeconds : int;
 private var displaySeconds : int;
 private var displayMinutes : int;
 var Clock : GUIText;
 var newSkin : GUISkin;
 var countDownSeconds : int;
 
 function Awake()
 {
     startTime = Time.time;
 }
 
 function OnGUI ()
 { 
     //make sure that your time is based on when this script was first called
     //instead of when your game started
     var guiTime = Time.time - startTime;
     
     restSeconds = countDownSeconds - (guiTime);
     
     //display messages or whatever here -->do stuff based on your timer
     if (restSeconds == 10) {
     }
     if (restSeconds == 0) {
         Time.timeScale = 0.0;
         GUI.Box(Rect(20, 15, 1040, 580), "");
 
         if(GUI.Button(Rect(60, 300, 450, 200), "Quit")) {
             Application.Quit();
         }
         if(GUI.Button(Rect(560, 300, 450, 200), "Replay Level")) {
             Application.LoadLevel("Level_1");
         }
     }
     //display the timer
     roundedRestSeconds = Mathf.CeilToInt(restSeconds);
     displaySeconds = roundedRestSeconds % 60;
     displayMinutes = roundedRestSeconds / 60; 
     
     Clock.text = String.Format ("{0:00}:{1:00}", displayMinutes, displaySeconds); 
 }
 
 //Total Score Script
 
 var ScoreBoard: GUIText;
 static var Points = 0;
 private var Total: int = 0;
 var topscore : int;
 
 function Update ()
 {
     ScoreBoard.text = ("Score: ") + Points;
     if (Points >= topscore){
         Application.LoadLevel("Level_2");
         Points = 0;
     }
 }

and here it the spawn script:

 var arr : Array;
 var game_cube : Rigidbody;
 var cube_count = 0;
 var walker0 : Transform;
 var walker1 : Transform;
 var walker2 : Transform;
 var walker3 : Transform;
 
 function Start ()
 {
     InvokeRepeating("LaunchProjectile", 2, 1);
     arr = new Array();
     arr.Push(walker0);
     arr.Push(walker1);
     arr.Push(walker2);
     arr.Push(walker3);
 }
 
 function LaunchProjectile ()
 {
     var randomPick : int = Random.Range(0,3);
     var spoint : Transform = arr[randomPick];
     var instance = Instantiate(game_cube, spoint.position, spoint.rotation);
     instance.velocity = Vector3.zero;
     cube_count++;
 }