How can I get score from another scene to Game Over scene?

Hello people. I need to get player's score to another scene when game is over.I try to figure out about PDontDestroyOnLoad and PlayerPref system but my brain has explode. So, can you widely explain to me which code should I write to where?

These are my code block;

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.SceneManagement;
 using UnityEngine.UI;
 
 public class MoveBtch : MonoBehaviour {
     public float movefast;
     public float moveup;
     public int puan;
 
 
     // Use this for initialization
     void Start () {
         Time.timeScale = 1;
         puan = 0;
 
     }
     
     // Update is called once per frame
     void Update () {
         transform.Translate (Vector3.forward * movefast * Time.deltaTime);
         if (Input.GetKeyDown(KeyCode.Space)) {
             GetComponent<Rigidbody> ().AddForce (Vector3.up * moveup);
         }
             
     }
 
     void OnTriggerEnter(Collider tuche){
     
         if (tuche.gameObject.tag=="Tetik") {
 
             tuche.gameObject.transform.parent.root.gameObject.GetComponent<Loop> ().touch = true;
             puan++;
         }
         if (tuche.gameObject.tag=="Wop") {
 
             tuche.gameObject.transform.parent.root.gameObject.GetComponent<Loop2> ().touch2 = true;
         }
 
 
     
     }
 
     void OnCollisionEnter (Collision tuche){
 
         if (tuche.gameObject.tag=="Engel") {
 
             GeymOvir ();
 
 
         }
     
     }
 
     void GeymOvir(){
 
         Time.timeScale = 0;
 
         SceneManager.LoadScene ("Pause");
 
          //The Pause scene is another scene which I try to read my score from first scene. Please help me out here.
 
     }
 
 }