I am having a problem with the script of level system

using UnityEngine;
using System.Collections;

public class LevelController : MonoBehaviour {

    public static LevelController intance;

    public int xpMultiply = 1;
    public float xpFirstLevel = 100;
    public float difficultFactor = 1.5f;

        private float xpNextLevel;

    // Use this for initialization
    void Start () {
        intance = this;
        DontDestroyOnLoad (gameObject);
        Application.LoadLevel("GamePlay");
   
        xpNextLevel = xpFirstLevel * (GetCurrentLevel () + 1) * difficultFactor;

        Debug.Log (xpNextLevel);
   
        PlayerPrefs.DeleteAll ();


    }
       
    Debug.Log (xpNextLevel);



    AddXp(10);
    Debug.Log(GetCurrentXp());


    }

    // Update is called once per frame
    void Update () {
    }

    public static void AddXp(float xpAdd){
        float newXp = (PlayerPrefs.GetFloat("currentXp")+xpAdd)*LevelController.intance.xpMultiply;
        PlayerPrefs.SetFloat("currentXp", newXp);
    }

    public static float GetCurrentXp(){
        return PlayerPrefs.GetFloat ("currentXp");
        }

        public static int GetCurrentLevel(){
        return PlayerPrefs.GetInt ("currentLevel");
    }

    public static void AddLevel(){
        int newLevel = GetCurrentLevel()+1
            PlayerPrefs.SetInt("currentLevel", newLevel);
    }

}

and the problem you are having is… ? what?

edit: lines 28-36 aren’t within a function and the closing } on line 37 doesn’t have an opening one… probably something to do with that at a guess…

Thank solved some problems but not all. I will post a picture of errors.

the level system is from a game I am creating with my friends. we are beginners but we intend to finish this game

As suggested in a previous thread, start by doing the tutorials & working through them. Then go back & start adding & changing things in those games. You will learn how to structure & code. The mistake you made here is similar to the one you made previously so please, stop & go do the tutorials.