Main Menu scrpit not working

Questions & Answers
1

I’m trying to script my main menu for my game
Here is the script

using UnityEngine;
using System.Collections;

//extend MonoBehaviour so that we can attach this script to an object
public class MenuObject: MonoBehaviour
{
//A public bool so that we can change in the editor whether or not the button will quit the application
public bool isQuit = false;

    //For the next three functions, the collider is absolutely necessary
    //these functions will not fire off if there is no collider

    //Fires off when the mouse hovers over the collider
    //When the mouse is over the item, change the colour of it to 
    //red so that the player knows that it is interacting with it
    void OnMouseEnter()
     {
             renderer.material.color = Color.red;
     }

    //Fires off when the mouse leaves the object
    //We want to change the colour of the object back to it's original when the mouse 
    //is no longer over it so that is exactly what we do here
    void OnMouseExit()
     {
             renderer.material.color = Color.white;
     }

    //Fires off when the mouse is clicked while hovering over the object
    //Here we check if the bool was set to true or not and we load the level id not
    //or quit the application if true
    void OnMouseDown()
     {
            if(isQuit)
             {
                    Application.Quit();
             }
            else
             {
                    Application.LoadLevel(1);
             }
     }

}

}

2

Initialize the value of bool in the start function instead of variable.
So, you can get exact result you want to do.

void Start(){
   isQuit = false;
}

void OnMouseEnter(){
  renderer.material.color = Color.red;
}

void OnMouseExit(){
  renderer.material.color = Color.white;
}

void OnMouseDown(){

  if(isQuit){
    
    Application.Quit();
  } else {
    
    Application.LoadLevel(1);
  }
}