CODE EXAMPLE FOR CSHARP

unity topdown

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;

public class 2dMovement : MonoBehaviour
{
  //This also works with joystick, PS this is topdown movement

 private Rigidbody2D rb;
 public float MoveSpeed = 15f;


 void Start ()
 {
   rb = GetComponent<Rigidbody2D>(); 
 }

 void Update ()
 {
    private float vertical;
    private float horizontal; 
 
    horizontal = Input.GetAxisRaw("Horizontal");
    vertical = Input.GetAxisRaw("Vertical"); 
 }

 private void FixedUpdate()
 {  
    rb.velocity = new Vector2(horizontal * MoveSpeed, vertical * MoveSpeed);
 }
}