Showing Time With GUI.Label

Hello everyone, I have 2 scripts in different levels i want to show the time when level changed that's my script ;

 using UnityEngine;
 using System.Collections;
 
 public class Timer : MonoBehaviour {
     
     private float TimeScore = 0;
 
     void Update () {
 
         TimeScore += 1 * Time.deltaTime;
         Debug.Log(TimeScore);
 
 
         if (Application.loadedLevelName == "Level1end") {
 
             PlayerPrefs.SetFloat("Timer",TimeScore);
 
     }
 
     }
 }

And this is the other level script ;

 using UnityEngine;
 using System.Collections;
 
 public class Level1End : MonoBehaviour {
     public GUIStyle style;
 
     void OnGUI()
     {
 
         {
             GUI.Label (new Rect (50, 60, 500, 500), "Time :   " + PlayerPrefs.GetFloat("Timer") , style );
 
         }
         {
      
 
 
     }
 }
 }

I don't know what's wrong with my script Timer always 0.

Thanks.