C# script to follow GameObject by GameObject.

 

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

// © 2017 TheFlyingKeyboard and released under MIT License
// theflyingkeyboard.net

public class FolowObject : MonoBehaviour {
    public GameObject target;

    public float moveSpeed;
    public float rotationSpeed;

    // Use this for initialization
    void Start () {
    
  }
  
  // Update is called once per frame
  void Update () {
        transform.position = Vector3.MoveTowards(transform.position, target.transform.position, moveSpeed * Time.deltaTime);

        Vector3 vectorToTarget = target.transform.position - transform.position;
        float angle = Mathf.Atan2(vectorToTarget.y, vectorToTarget.x) * Mathf.Rad2Deg;
        Quaternion qt = Quaternion.AngleAxis(angle, Vector3.forward);
        transform.rotation = Quaternion.RotateTowards(transform.rotation, qt, Time.deltaTime * rotationSpeed);
    }
}

 

Unity 2D C# Follow GameObject
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