HOW TO MOVE ANIMATED OBJECT ON CANVAS

Please I have an animated coin spinning at the top corner of my canvas. I need help in moving this coin with the mouse on right click. They don't necessarily need to be in the same position (the mouse being over the coin) as I just need the transform position of the coin to translate with that of the mouse. Many scripts I found moved the coin in 3d and the coin gets left behind when I move my character forward but I need it to remain planar (moving only in x and y like on the canvas). By the way, my canvas uses a secondary camera. The last script I tried took the coin out of sight

   private Vector3 mousePosition;
 public float moveSpeed = 0.1f;

 // Use this for initialization
 void Start () {

 }

 // Update is called once per frame
 void Update () {
     if (Input.GetMouseButton(1)) {
         mousePosition = Input.mousePosition;
         mousePosition = Camera.main.ScreenToWorldPoint(mousePosition);
         transform.position = Vector3.Lerp( new Vector3 (transform.position.x , transform.position.y, -5), mousePosition, moveSpeed);
     }

 }

A solution would be very much appreciated. Thank you.