Error CS0246 help please

Script: using UnityEngine; using System.Collections;

 public class Player : MovingObject {
 
     public float restartLevelDelay = 1f;     
     public int pointsPerFood = 10;            
     public int pointsPerSoda = 20;             
     public int wallDamage = 1;                 


     private Animator animator;                  
     private int food;                       


     protected override void Start ()
     {
         animator = GetComponent<Animator>();

         food = GameManager.instance.playerFoodPoints;

         base.Start ();
     }


     private void OnDisable ()
     {
         GameManager.instance.playerFoodPoints = food;
     }


     private void Update ()
     {
         if(!GameManager.instance.playersTurn) return;

         int horizontal = 0;     
         int vertical = 0;  


         horizontal = (int) (Input.GetAxisRaw ("Horizontal"));

         vertical = (int) (Input.GetAxisRaw ("Vertical"));

         if(horizontal != 0)
         {
             vertical = 0;
         }
             
         if(horizontal != 0 || vertical != 0)
         {

             AttemptMove<Wall> (horizontal, vertical);
         }
     }

     protected override void AttemptMove <T> (int xDir, int yDir)
     {
         food--;

         base.AttemptMove <T> (xDir, yDir);

         RaycastHit2D hit;

         if (Move (xDir, yDir, out hit)) 
         {
             //Call RandomizeSfx of SoundManager to play the move sound, passing in two audio clips to choose from.
         }
             
         CheckIfGameOver ();

         GameManager.instance.playersTurn = false;
     }
         
     protected override void OnCantMove <T> (T component)
     {
         Wall hitWall = component as Wall;

         hitWall.DamageWall (wallDamage);

         animator.SetTrigger ("playerChop");
     }
         
     private void OnTriggerEnter2D (Collider2D other)
     {
         if(other.tag == "Exit")
         {
             Invoke ("Restart", restartLevelDelay);

             enabled = false;
         }
             
         else if(other.tag == "Food")
         {
             food += pointsPerFood;

             other.gameObject.SetActive (false);
         }
             
         else if(other.tag == "Soda")
         {
             food += pointsPerSoda;


             other.gameObject.SetActive (false);
         }
     }
         
     private void Restart ()
     {
         Application.LoadLevel (Application.loadedLevel);
     }
         
     public void LoseFood (int loss)
     {
         animator.SetTrigger ("playerHit");

         food -= loss;

         CheckIfGameOver ();
     }


     private void CheckIfGameOver ()
     {
         if (food <= 0) 
         {
             
             GameManager.instance.GameOver ();
         }
     }
 }

Error: Assets/S&S&S/Scripts/GameManager.cs(5,31): error CS0246: The type or namespace name `MovingObject' could not be found. Are you missing a using directive or an assembly reference?