A problem with Ruby tutorial

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class RubyController : MonoBehaviour
{
// Start is called before the first frame update
void Start()
{

}
// Update is called once per frame
void Update()
{
float horizontal = Input.GetAxis("Horizontal");
Debug.Log (horizontal);
Vector2 position = transform.position;
position.x = position.x + (0.1f * horizontal);
transform.position = position;
}
}

The above is the code I copied from the Tutorial Ruby's Adventure
The problem I am having is with the testing of this code

When I enter game mode, the sprite begins moving to the right and responds to the left arrow key by moving left but then moves right again with no key pushed

I've tried Unity versions 2018.3 and 2019.1 to no avail, have tried running the code one line at a time using the comment slashes and even initializing the variable horizontal to 0 in the void Start() section and as the 1st line of the void Update section

Any help will be appreciated,
Ram

 

Your Debug.Log output should show you what is going on. I suspect it is different, depending on the left key press.