,Restart Scene after level Completion

Hello, everyone! I developed a jigsaw puzzle game and almost complete but there is one problem when I complete the level, the completion panel showing automatically which I set in C sharp script and I want this but the problem is, it's not working when I restart that level or trying to close the completion panel to start the level again. It's working when I restart the game.

Note: I assigned the level complete script to all pieces of the puzzle which is:

using System.Collections; using System.Collections.Generic; using UnityEngine;

public class MexicoGM : MonoBehaviour { public static int remainingPieces = 4;

 public GameObject Complete;




 void Update()
 {


     if (remainingPieces == 0)
     {
         Complete.gameObject.SetActive(true);
     }
 }

},Hello, everyone! I developed a jigsaw puzzle game and almost complete but there is one problem when I complete the level, the completion panel showing automatically which I set in C sharp script and I want this but the problem is, it's not working when I restart that level or trying to close the completion panel to start the level again. It's working when I restart the game.

Note: I assigned the level complete script to all pieces of the puzzle which is:

public class CompleteLevel : MonoBehaviour { public static int remainingPieces = 4;

 public GameObject Complete;




 void Update()
 {


     if (remainingPieces == 0)
     {
         Complete.gameObject.SetActive(true);
     }
 }

}

I think I need to add something here to restart the game once it complete by the user.

Please Help.