Load and Save Scenes with PlayerPrefs.Set/GetInt

Hello. That i am trying to do is

When i win at 1 scene, i want to save it,

after if i close the PlayMode(Or my game) i want make it to Make Load Scene like Games saving the scene and if you want to continue the last Scene just select The scene and play. For Example :

I have 3 Scenes.

MainMenu Level1 Level2

I am start the game and i haven't play this game again to my Pc. i am pressing New Game I am playing Level1 scene and when i win (with an winnerScript) i set it to make PlayerPrefs save the last map i played.;

After i set it to go me at Level2 Scene. When i Finish i make it to Save data again.

that i want to fix are at main menu make the Scenes i had play and i can play Right now.

my Scripts(JavaScript) are as following: MainMenu:

 private function loadProfFunc(id : int) {
     if(PlayerPrefs.GetInt("Test", mapLevel) == 0) {
         if(GUILayout.TextArea("You haven't Start Any Level."));
     }
    
     if(numberLoad == 1) {
         if(PlayerPrefs.GetInt("Test",generalLevels.mapLevel) == 1) {
         
             generalLevels.mapLevel = 1;
             Application.LoadLevel(1);
         }
     }
 }

generalLevels:

 // This Code are to give the map a ID
 public static var mapLevel = 0;

winnerPlayer:

 function OnTriggerEnter(winner : Collider) {
     if(winner.tag == "Player") {
         generalLevels.mapLevel = generalLevels.mapLevel + 1;
         PlayerPrefs.SetInt("Test", generalLevels.mapLevel);
 
     }
 }

That was all my Scripts(a part of Them)

How can i fix it? If there any problem what must to do? Is this way true for that i am trying to do? if no what way is better and how can i do it? If already exist a answer like this (just send me the link)

thank you for read me!