Moving Player to a Point Clicked by the Mouse on a Surface

ClickedPointMovement.cs

using System.Collections;
using UnityEngine;

public class ClickedPointMovement : MonoBehaviour
{
    public float speed = 30;
    RaycastHit hit;
    Camera mainCam;
    Coroutine _MoveCR;
    int layerMask;

    void Awake()
    {
        mainCam = Camera.main;
        layerMask = LayerMask.GetMask("Ground");
    }

    void Update()
    {
        if (Input.GetMouseButtonDown(0))
        {
            if (Physics.Raycast(mainCam.ScreenPointToRay(Input.mousePosition), out hit, 100, layerMask))
            {
                if(_MoveCR != null)
                {
                    StopCoroutine(_MoveCR);
                }
                _MoveCR = StartCoroutine(MoveToPosition(hit.point));
            }
        }
    }

    IEnumerator MoveToPosition(Vector3 targetPoint)
    {
        targetPoint = new Vector3(targetPoint.x, transform.position.y, targetPoint.z);
        while (Vector3.Distance(transform.position, targetPoint) > 0.01f)
        {
            transform.position = Vector3.MoveTowards(transform.position, targetPoint, speed * Time.deltaTime);
            yield return null;
        }
    }
}