Need help with PlayerPrefs

Hello! Im using c#, and i have this script. Note, that this is not the full script. I deleted all others, so it's not so messy and you can read it easier ( I know, i have bad english knowledge ).

There are 2 scenes: MainMenu, and the Map. This is the script in the Map, named PlayerControl. ( It will give you money by picking up but now i coded by pressing ''A'' key. ) When i leave ( escape button ) it goes to the menu. When i go back ( There is a button that drops the player to ''Map'' ) it doesn't saves the players ''money''.

 using UnityEngine;
 using System.Collections;
 
 public class PlayerControl : MonoBehaviour {
     
         public int money;
     
     // Use this for initialization
     void Start () {
         PlayerPrefs.GetInt("money", money);
     }
     
     
     // Update is called once per frame
     void Update () {
         
          if (Input.GetKeyDown(KeyCode.Escape))     {    
                     PlayerPrefs.Save();
             Application.LoadLevel("Menu");
         }
          if (Input.GetKeyDown(KeyCode.A)) {
                     money = money + 1;
             PlayerPrefs.SetInt("Money", money);
         }
     }
     void OnGUI () {
         
         GUI.Label (new Rect (50, 75, 100, 30), "Money");
         GUI.Label (new Rect (150, 75, 100, 30), money.ToString());
     }
 }

Thank you!

( Here is the full script, but im almost 100% sure that these are not required for saving )

 using UnityEngine;
 using System.Collections;
 
 public class PlayerControl : MonoBehaviour {
     
         public    float accelerationofallstuff = 1;
         public static float nanometersinglerun = 0;
         public int money;
     
     // Use this for initialization
     void Start () {
         Screen.showCursor = false;    
         bool showrewardsondeath = false;
         PlayerPrefs.GetInt("money", money);
     }
     
     
     // Update is called once per frame
     void Update () {
         
         accelerationofallstuff = Time.timeSinceLevelLoad / 20;
         nanometersinglerun = Time.timeSinceLevelLoad * accelerationofallstuff;
         
            bool showrewardsondeath = false;
         
            float deltax = Input.GetAxis("Mouse X");
            transform.position = new Vector3 (transform.position.x + deltax, 0, 0);
         
         if (transform.position.x > 10)
            transform.position = new Vector3 (10,0,0);
         if (transform.position.x < -10)
             transform.position = new Vector3 (-10,0,0);
         
          if (Input.GetKeyDown(KeyCode.Escape))     {    
                     PlayerPrefs.Save();
             Application.LoadLevel("Menu");
         }
          if (Input.GetKeyDown(KeyCode.A)) {
                     money = money + 1;
             PlayerPrefs.SetInt("Money", money);
         }
     }
     void OnGUI () {
         
         GUI.Label (new Rect (50, 25, 100, 30), "Nanometer");
         GUI.Label (new Rect (50, 50, 100, 30), "Time");
         GUI.Label (new Rect (50, 75, 100, 30), "Money");
         GUI.Label (new Rect (150, 25, 100, 30), nanometersinglerun.ToString("F1"));
         GUI.Label (new Rect (150, 50, 100, 30), Time.timeSinceLevelLoad.ToString("F1"));
         GUI.Label (new Rect (150, 75, 100, 30), money.ToString());
         
         if (Time.timeSinceLevelLoad < 2)
             GUI.Label (new Rect (Screen.width /2 -50, 50, 160, 30), "Activating Nanobot");
         
         if (Time.timeSinceLevelLoad > 3)
             GUI.Label (new Rect (Screen.width /2 -30, 50, 100, 30), "Charging...");
     }
 }