Next Level to unlock when first level is completed

Hi,

I have a problem at the moment where I have a level unlock system that should unlock when a certain scene is closed. I got the code from a youtube video so I'm not sure where I need to edit it, there are 2 scripts that make up the system a level manager which governs the system overall, and a gamemanager which is applied to the scene which should unlock the next level.

The main issue I have is that the levels need to be called specific things, so in the code if you finish Level1 it unlocks level2. Also the first level unlocks by looking for level1, so normally loading and finishing level1 would unlock level 2. My difficulty is that I have multiple scenes that need to be completed for level2 to be unlocked. So I have level1, level1.2 and level1.3, the code unlocks level1 at start but will also unlock level2 as it checks that level1 has loaded to load level2, and I want level2 to start when I finish level1.3 and not level1.

Here are the relevant parts of the code for each script;

• levelmanager;

  ---

     [System.Serializable]
       public class Level
       {
           public string LevelText;
           public int UnLocked;
           public bool IsInteractable;
       }
       public GameObject levelButton;
       public Transform Spacer;
       public List<Level> LevelList;
   
       void Start () 
       {
           FillList ();
       }
       
       void FillList()
       {
           foreach (var level in LevelList) 
           {
               GameObject newbutton = Instantiate (levelButton) as GameObject;
               LevelButtonNew button = newbutton.GetComponent<LevelButtonNew> ();
               button.LevelText.text = level.LevelText;
   
               if (PlayerPrefs.GetInt ("Level" + button.LevelText.text) == 1) //this if statement unlocked the first level when a player opens the game for the first time
               {
                   level.UnLocked = 1;
                   level.IsInteractable = true;
               }
   
               button.unlocked = level.UnLocked;
               button.GetComponent<Button> ().interactable = level.IsInteractable; 
               button.GetComponent<Button> ().onClick.AddListener (() => loadLevels ("Level" + button.LevelText.text )); //loads a level based on the name that the scene has been saved as
   
               if (PlayerPrefs.GetInt ("Level" + button.LevelText.text + "_score") > 0) 
               {
                   button.star1.SetActive (true);
               }    
   
               if (PlayerPrefs.GetInt ("Level" + button.LevelText.text + "_score") > 5000) 
               {
                   button.star2.SetActive (true);
               }    
   
               if (PlayerPrefs.GetInt ("Level" + button.LevelText.text + "_score") > 9999) 
               {
                   button.star3.SetActive (true);
               }
   
               newbutton.transform.SetParent (Spacer, false);
           }
   
           SaveAll ();
   
       }
   
       void SaveAll ()
       {
           {
               GameObject[] allbuttons = GameObject.FindGameObjectsWithTag ("LevelButton");
               foreach (GameObject buttons in allbuttons) 
               {
                   LevelButtonNew button = buttons.GetComponent<LevelButtonNew> ();
                   PlayerPrefs.SetInt ("Level" + button.LevelText.text, button.unlocked);
               }
           }
       }
   
       void loadLevels(string value)
       {
           SceneManager.LoadScene (value);
       }
   }
  
  

  ---

• gamemanager;

  ---

      public Text scoreText;
       public int score = 10;    
       private int LevelAmount = 7; //this needs to be updated if the level count changes
       private int CurrentLevel;
   
       void Start ()
       {
           CheckCurrentLevel ();
       }
   
       void CheckCurrentLevel()
       {
           for (int i = 1; i < LevelAmount; i++) 
           {
               if (SceneManager.GetActiveScene().name == "Level" + i) 
               {
                   CurrentLevel = i;
                   SaveMyGame ();
               }
           }
       }
   
       void SaveMyGame()
       {
           int NextLevel = CurrentLevel + 1;
           if (NextLevel < LevelAmount) {
               PlayerPrefs.SetInt ("Level" + NextLevel.ToString(), 1);//unlock next level
               PlayerPrefs.SetInt ("Level" + CurrentLevel.ToString () + "_score", score);
           } 
           else 
           {
               PlayerPrefs.SetInt ("Level" + CurrentLevel.ToString () + "_score", score);
           }
       }
   }
  
  
  

There may be some stray syntax because I cut code out so don't worry about that. I'm really at a loss with how to do this, I understand it's a lot to go through so any help or advice will be appreciated.