Broken SaveSystem

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


public class SaveSystem : MonoBehaviour {

    public static SaveSystem saveSystem;
    public int playerLevel = 1;
    public float xp;
    public float xpToNextLevel = 100;
    public int skillPoints = 0;
    public int gold = 0;
    public bool hasGame;
    public int numberOfEnemys = 1;
    public float playerHeath = 100;

    [Header("Shop")]
    public List<ShopStuff> shopList = new List<ShopStuff>();
    public int mainWeapon = 1;
    public int sideWeapon = 1;
    public bool hasItem;

    [Header("Inventory")]
    public List<Item> items = new List<Item>();

    [Header("Perks")]
    public float drawSpeed = 260f;
    public int drawSpeedDamage;
    public int drawSpeedN;
    public int AddHealth;
    public int AddHealthN;
    public float addStamina;

    [Header("Level")]
    public bool main;
    public bool arena;
    public bool trainig;
    public bool death;
    public bool Barracks;

    public GameObject playerControlls;

    [Header("Customize Character")]
    public string playerName;

    void Awake () {
        if (saveSystem != null)
        {
            Debug.LogError ("More then one GameControllers in the scene");
        }
        else
        {
            saveSystem = this;
        }
        Load ();
    }

    void Update()
    {
        if (xp >= xpToNextLevel)
        {
            playerLevel++;
            skillPoints++;
            xpToNextLevel += xpToNextLevel;
        }
    }

    public void Controlls()
    {
        playerControlls.SetActive(!playerControlls.activeSelf);
    }

    public void Save()
    {
        BinaryFormatter bf = new BinaryFormatter();
        FileStream file = File.Create(Application.persistentDataPath + "/playerInfo.data");

        PlayerData data = new PlayerData();
        data.playerLevel = playerLevel;
        data.xp = xp;
        data.xpToNextLevel = xpToNextLevel;
        data.skillPoints = skillPoints;
        hasGame = true;
        data.hasGame = hasGame;
        data.gold = gold;
        data.drawSpeed = drawSpeed;
        data.drawSpeedNumber = drawSpeedN;
        data.AddHealth = AddHealth;
        data.AddHealthN = AddHealthN;
        data.drawSpeedDamage = drawSpeedDamage;
        data.numberOfEnemys = numberOfEnemys;
        data.mainWeapon = mainWeapon;
        data.sideWeapon = sideWeapon;
        data.hasItem = hasItem;
        data.arena = arena;
        data.death = death;
        data.main = main;
        data.trainig = trainig;
        data.Barracks = Barracks;
        data.playerHeath = playerHeath;
        data.addStamina = addStamina;
        data.playerName = playerName;
        data.items = items;
        data.shopList = shopList;

        bf.Serialize(file, data);

        file.Close();

        Debug.Log("has been saved");
    }

    public void Load()
    {
        Debug.Log("has deen Laoding");
        if (File.Exists(Application.persistentDataPath + "/playerInfo.data"))
        {
            BinaryFormatter bf = new BinaryFormatter();
            FileStream file = File.Open (Application.persistentDataPath +   "/playerInfo.data", FileMode.Open);
            PlayerData data =  (PlayerData)bf.Deserialize (file);

            file.Close();
            playerLevel = data.playerLevel;
            xpToNextLevel = data.xpToNextLevel;
            skillPoints = data.skillPoints;
            xp = data.xp;
            gold = data.gold;
            drawSpeed = data.drawSpeed;
            drawSpeedN = data.drawSpeedNumber;
            AddHealth = data.AddHealth;
            AddHealthN = data.AddHealthN;
            hasGame = data.hasGame;
            drawSpeedDamage = data.drawSpeedDamage;
            numberOfEnemys = data.numberOfEnemys;
            mainWeapon = data.mainWeapon;
            sideWeapon = data.sideWeapon;
            shopList = data.shopList;
            hasItem = data.hasItem;
            death = data.death;
            main = data.main;
            trainig = data.trainig;
            arena = data.arena;
            Barracks = data.Barracks;
            playerHeath = data.playerHeath;
            addStamina = data.addStamina;
            playerName = data.playerName;
            items = data.items;

            Debug.Log ("has deen Laoded");
        }
    }

    public void Delete()
    {
        File.Delete(Application.persistentDataPath + "/playerInfo.data");
        Debug.Log("has deen deleted");
        playerLevel = 1;
        skillPoints = 0;
        xp = 0;
        xpToNextLevel = 100;
        gold = 0;
        hasGame = false;
        drawSpeed = 260f;
        drawSpeedN = 0;
        AddHealthN = 0;
        AddHealth = 0;
        drawSpeedDamage = 0;
        numberOfEnemys = 1;
        PlayerPrefs.DeleteAll();
        mainWeapon = 1;
        sideWeapon = 1;
        hasItem = false;
        playerHeath = 100;
        main = true;
        trainig = false;
        arena = false;
        death = false;
        Barracks = false;
        addStamina = 0;
        playerName = "Player";
        items.Clear();


       Debug.Log ("has staets has been reset");
    }
}

[Serializable]
class PlayerData
{
    public int playerLevel;
    public float xp;
    public float xpToNextLevel;
    public int skillPoints;
    public int gold;
    public int AddHealth;
    public int AddHealthN;
    public int drawSpeedNumber;
    public int drawSpeedDamage;
    public float drawSpeed;
    public bool hasGame;
    public int numberOfEnemys;
    public List<ShopStuff> shopList = new List<ShopStuff>();
    public int mainWeapon;
    public int sideWeapon;
    public float addStamina;
    public bool hasItem;

    public bool main;
    public bool arena;
    public bool trainig;
    public bool death;
    public bool Barracks;
    public float playerHeath;

    public string playerName;

    public List<Item> items = new List<Item>();
}