Help with topdown movement in Unity2d?

So, I have looked over the internet for a bit now, yet everything I try doesn’t work. I put a movement script I have from a platformer onto the player, but I can only move it left and right. I am gonna post my code below, but my question is how to make it move up and down? Thanks for any help!

using UnityEngine;
using System.Collections;

public class MoveTopDown : MonoBehaviour {
	
	public float speed =1.0f;
	public string axisName = "Horizontal";

	
	// Use this for initialization
	void Start () {
		
	}
	
	void Update ()
	{

	}
	
	
	
	// Update is called once per frame
	void FixedUpdate () {
		if (Input.GetAxis (axisName) > 0)
		{
			Vector3 newScale = transform.localScale;
			newScale.y = 1.0f;
			newScale.x = 1.0f;
			transform.localScale = newScale;
			
		} 
		else if (Input.GetAxis (axisName) < 0)
		{
			Vector3 newScale =transform.localScale;
			newScale.x = 1.0f;
			transform.localScale = newScale;        
			
		}
		
		
		transform.position += transform.right * Input.GetAxis (axisName) * speed * Time.deltaTime;	
	}
}

You need to add a second axisName at the top of the file:

public string axisName2 = "Vertical";

Then you need to insert this at line 40:

transform.position += transform.up * Input.GetAxis(axisName2) * speed * Time.deltaTime;