Question by 
               IshanCK · Nov 21, 2017 at 11:41 PM · 
                unity 52d gameerror build  
              
 
              My enemy is going the wrong way
My enemy is going the OPPISITE way of the character or just going southeast.
 public float speed = 5f;
 public Transform target;
 public float rotateSpeed = 200f;
 private Rigidbody2D rb;
 // Use this for initialization
 void Start () {
     rb = GetComponent<Rigidbody2D> ();
 }
 
 // Update is called once per frame
 void FixedUpdate () {
     Vector2 direction = (Vector2)target.position - rb.position;
     direction.Normalize ();
 
     float rotateAmt = Vector3.Cross (direction, transform.up).z;
     rb.angularVelocity = rotateAmt * rotateSpeed;
     rb.velocity = transform.down * speed;
 }
 
               } `
               Comment
              
 
               
               
               Best Answer 
              
 
              Answer by NinjaISV · Nov 22, 2017 at 12:49 AM
The main problem here is that you are using transform.down (which does not exist as far as I know) You need to use -transform.up
I've re-coded your script to work perfectly and show an example of how it works.

(New Script)
 using UnityEngine;
 
 public class FollowTarget : MonoBehaviour {
     public Transform target;
 
     [Space(6)]
     public float speed = 2f;
     public float rotateSpeed = 500f;
     private new Rigidbody2D rigidbody;
 
     // Use this for initialization
     private void Start () {
         rigidbody = GetComponent<Rigidbody2D> ();
     }
      
     // Update is called once per frame
     private void FixedUpdate () {
         Vector2 direction = ((Vector2) target.position - rigidbody.position).normalized;
      
         float rotateAmt = Vector3.Cross (direction, transform.up).z;
         rigidbody.angularVelocity = rotateAmt * rotateSpeed;
         rigidbody.velocity = -transform.up * speed;
     }
 
 } 
 
               NOTE: You must ensure that gravity scale is set to 0 on the rigidbody: 
Hope this helps you! Thanks!
 
                 
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