Parsing Error, code in android for a button

Hello. I'm a completely beginner in unity and scripting. But I see tutorials and etc and I'm learning a lot. I'm now doing an Android Game. Now I have a code that will press a button and will for example do something like Load a Scene to start the game. A Start Game button and a Quit Game button.

My code is this:

 using UnityEngine;
 using System.Collections;
 var isQuitButton = false
 
 public class TestButton : TouchLogicV2 
 {
     public bool disableTouches;
     
     public override void Update()//(optional) only use Update if you need to
     {
         //you can do some logic before you check for the touches on screen
         
         if(!disableTouches)//(optional) dynamically change whether or not to check for touches
             base.Update();//must have this somewhere or TouchLogicV2's Update will be totally overwritten by this class's Update
     }
     
     public override void OnTouchBegan()
     {
         if( isQuitButton )
         {
             //QuitTheGame
             Application.Quit();
         }
         else
         {
             //LoadTheGame
             Application.LoadLevel("Test");
         }
     }
 }

But this gives me a Parsing Error... I think the error is inside public override void OnTouchBegan() and I say this because this other code works good:

 using UnityEngine;
 using System.Collections;
 
 public class TestButton : TouchLogicV2 
 {
     public bool disableTouches;
     
     public override void Update()//(optional) only use Update if you need to
     {
         //you can do some logic before you check for the touches on screen
         
         if(!disableTouches)//(optional) dynamically change whether or not to check for touches
             base.Update();//must have this somewhere or TouchLogicV2's Update will be totally overwritten by this class's Update
     }
     
     public override void OnTouchBegan()
     {
         print ("HELLO FROM TEST BUTTON!");
     }
 }

Can you explain me what am I doing wrong in a beginner form? Or can you say me a form to create a button that Starts the game and another to quit the game like a Main Menu? Thanks in advance!