Snake head should be followed by tail like classic snake game

I have made one script but problem is that snake move like rope, i want to make it move like Classic Snake Game. I have used hing joint to attach tail to snake head.

Here is my script:

 using UnityEngine;
 using System.Collections;
 
 public class snakeHeadMovement : MonoBehaviour 
 {
     public float MovementSpeed =5.0f;
     public float TurnSpeed = 20.0f;
     public GameObject TailPrefab, ApplePrefab;
     private GameObject lastChain=null;
     private float moveSpeed = 1.7f;
     private int counter = 0;
     public int Score = 0, Lives = 3;
 
     void snake_addTail() 
     {
 
        if(lastChain == null)
        lastChain = gameObject;
 
         GameObject newChain  = (GameObject) Instantiate(TailPrefab, lastChain.transform.position - lastChain.transform.forward, Quaternion.identity); 
        newChain.transform.rotation = lastChain.transform.rotation;
        HingeJoint hingeJoint = (HingeJoint) newChain.GetComponent<HingeJoint>();
 
        if(hingeJoint != null) 
        {
        hingeJoint.connectedBody = lastChain.rigidbody;
        lastChain = newChain;
        }
        counter++;
        rigidbody.mass++; // make the head weight greater so it can carry it's tail... lol
        moveSpeed += 0.05f;
     }
 // Use this for initialization
     void Start () 
     {
         snake_addTail();
     }
 
     void OnGUI()
     {
        GUI.color = Color.magenta;
        GUI.Label(new Rect(410, 20, 100, 20), "Score: " + Score);
        GUI.Label(new Rect(490, 20, 100, 20), "Lives: " + Lives);
     }
 
     void OnCollisionEnter(Collision collision) 
     {
 
     if(collision.gameObject.name == "apple" || collision.gameObject.name == "applePrefab(Clone)" ) 
     {
        Destroy(collision.gameObject);
        Score++;  
         snake_addTail();
         return;
     }  
     if((collision.gameObject.tag == "boundry")||(collision.gameObject.name=="tailPrefab(Clone)"))
 
     {
         Lives--;
     }
     }
 
 // Update is called once per frame
 
     void Update () 
     {
        transform.Translate(Vector3.forward * MovementSpeed * Time.deltaTime);
 
 
        if(Input.GetKey(KeyCode.UpArrow))
        {
          transform.Translate ( new Vector3(1,0,1) );
            transform.Rotate(0,180,0);
          transform.Translate ( new Vector3(0,0,1) );
        } 
 
        if(Input.GetKey(KeyCode.RightArrow))
        {
            //transform.Rotate(new Vector3(0,90,0));
 
        }
 
        if(Input.GetKey(KeyCode.LeftArrow))
        {
 //       transform.Rotate(new Vector3(0,-90,0));
 
        }
 
        if(Input.GetKey(KeyCode.DownArrow))
        {    
          transform.Translate ( new Vector3(1,0,1) );
          transform.Rotate(0,180,0);
          transform.Translate ( new Vector3(0,0,-1) );  
        } 
 
 
 
        float r = Random.Range(0, 100);
        if(r > 90 && GameObject.FindWithTag("apple") == null)  
        {
        float range = 5.0f;
        Vector3 pos = new Vector3(Random.Range(-range,range), 0, Random.Range(-range,range));
        Instantiate(ApplePrefab, pos, Quaternion.identity);
        }
     }
 }