Can't get my ball to move.

Hey all, I'm currently doing this tutorial.

For whatever reason when i copy the code i just cannot get my ball to move like in the tutorial.

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class Bundy : MonoBehaviour
 {
     // Start is called before the first frame update
     void Start()
     {
 
     }
 
     // Update is called once per frame
     void Update()
     {
         transform.Translate(Input.GetAxis("Horizontal"), 0, 0);
     }
 }
 

I'm 100% sure i've got it exactly but for whatever reason Unity just won't work with me on it. Could someone please point out how i'm being an idiot thanks.