I need my play button to load level 1 when the player touches the play button

I have develop an mobile game app that works perfectly fine on pc even on mobile the only problem that I am having with it on mobile is that the play button won't load level 1 and this is because of the code that is on line 6-10, I need to load level 1 when the player touches the play button. Please help I am so close to uploading my first app on the play store and really need to fix this small problem.

Thanks in advance :)

using UnityEngine; using System.Collections;

 public class MainMenu : MonoBehaviour {
     
     public string startLevel;
     
     public void NewGame()
     {
         Application.LoadLevel (startLevel);
     }
 
     public void QuitGame()
     {
         Application.Quit ();
     }
 }