"namespace or end of file expected" Not sure what to do. 2D Rouge-Like Tutorial

 using UnityEngine;
 using System.Collections;
 
     using System.Collections.Generic;        
     using UnityEngine.UI;                    
     
     public class GameManager : MonoBehaviour
     {
         public float levelStartDelay = 2f;                        
         public float turnDelay = 0.1f;                            
         public int playerFoodPoints = 100;                        
         public static GameManager instance = null;                
         [HideInInspector] public bool playersTurn = true;        
         
         
         private Text levelText;                                    
         private GameObject levelImage;                            
         private BoardManager boardScript;                    
         private int level = 1;                                    
         private List<Enemy> enemies;                            
         private bool enemiesMoving;                                
         private bool doingSetup = true;                            
         
         
         void Awake()
         {
             
             if (instance == null)
                 
                 
                 instance = this;
             
     
             else if (instance != this)
                 
                 
                 Destroy(gameObject);    
             
             DontDestroyOnLoad(gameObject);
             
             enemies = new List<Enemy>();
             
             boardScript = GetComponent<BoardManager>();
             
 
             InitGame();
         }
         
         void OnLevelWasLoaded(int index)
         {
             
             level++;
             
             InitGame();
         }
                 
         void InitGame()
         {
             
             doingSetup = true;
             
             levelImage = GameObject.Find("LevelImage");
                         
             levelText = GameObject.Find("LevelText").GetComponent<Text>();
             
             levelText.text = "Day " + level;
             
             levelImage.SetActive(true);
             
             Invoke("HideLevelImage", levelStartDelay);
             
             enemies.Clear();
             
             boardScript.SetupScene(level);
             
         }
         
         
         void HideLevelImage()
         {
             levelImage.SetActive(false);
             
             doingSetup = false;
         }
         
         void Update()
         {
             if(playersTurn || enemiesMoving || doingSetup)
                 
                 return;
 
             StartCoroutine (MoveEnemies ());
         }
         
         public void AddEnemyToList(Enemy script)
         {
             enemies.Add(script);
         }
         
         public void GameOver()
         {
             levelText.text = "After " + level + " days, you starved.";
             
             levelImage.SetActive(true);
             
             enabled = false;
         }
 
         IEnumerator MoveEnemies()
         {
             enemiesMoving = true;
             
             yield return new WaitForSeconds(turnDelay);
             
             if (enemies.Count == 0) 
             {
                 yield return new WaitForSeconds(turnDelay);
             }
             
             for (int i = 0; i < enemies.Count; i++)
             {
                 enemies[i].MoveEnemy ();
      
                 yield return new WaitForSeconds(enemies[i].moveTime);
             }
     
             playersTurn = true;
             
             enemiesMoving = false;
         }
     }
   }