LevelController

using System.Collections.Generic;
using System.IO;
using System.Runtime.Serialization.Formatters.Binary;
using UnityEngine;
using UnityEngine.SceneManagement;

public class LevelController : MonoBehaviour
{
    private int curScene;
    public ObstacleController obstacleController;
    public TextAsset level1;
    public TextAsset level2;
    public int levelIndex = 0;
    public List<TextAsset> JsonList = new List<TextAsset>();

    void Start()
    {
        Debug.Log(Application.persistentDataPath + "/save.dat");
        LoadFile();
        SaveFile();
    }
    public void SaveFile()
    {
        string destination = Application.persistentDataPath + "/save.dat";
        FileStream file;

        if (File.Exists(destination)) file = File.OpenWrite(destination);
        else file = File.Create(destination);

        GameData data = new GameData(levelIndex);
        BinaryFormatter bf = new BinaryFormatter();
        bf.Serialize(file, data);
        file.Close();
    }

    public void LoadFile()
    {
        string destination = Application.persistentDataPath + "/save.dat";
        FileStream file;

        if (File.Exists(destination)) file = File.OpenRead(destination);
        else
        {
            Debug.LogError("File not found");
            return;
        }

        BinaryFormatter bf = new BinaryFormatter();
        GameData data = bf.Deserialize(file) as GameData;
        levelIndex = data.curLevel;
        file.Close();


        Debug.Log(data.curLevel);
    }

    public void CreateJsonList()
    {
        JsonList.Add(level1);
        JsonList.Add(level2);
    }

    public void NextLevel()
    {
        if(levelIndex+1 < JsonList.Count)
        {
            ++levelIndex;
            SaveFile();
            SceneManager.LoadScene(SceneManager.GetActiveScene().name);
            obstacleController.JSON = JsonList[levelIndex];
        }
    }
    public void RestartLevel()
    {
        SceneManager.LoadScene(SceneManager.GetActiveScene().name);
        obstacleController.JSON = JsonList[levelIndex];
    }

    public void MainMenu()
    {
        SceneManager.LoadScene(0);
    }
}