Game over scene when the time is up ?

First off make sure you format your code second make a script called Countdown or something and use this code JavaScript:

 var Minutes = 1; 
 function Start(){
 yield WaitForSeconds(Minutes * 60);
 Application.LoadLevel("NAMEOFSCENE");
 }

Or if you prefer C# (This may not work I don't use C# but you get the idea):

 public class Example : MonoBehaviour {
 public int Minutes = 1;
     void Start() {
 
         yield return new WaitForSeconds(Minutes * 60);
 
     }
 }

Unfortunately, in C#, Coroutines aren't that easy to start as in US. Here's how it should look: public int minutes = 1;

 IEnumerator GameOver()
 {
 yield return new WaitForSeconds(minutes * 60);
 Application.LoadLevel("GAMEOVERSCENE");
 }
 
 ...
 
 void Start () //Countdown will begin when you load in the script
 {
 StartCoroutine(GameOver());
 ...
 }

In C#, you explicitly have to set the method IEnumerator, and start it with StartCoroutine.