PlayerMovement.cs

/*
 *      Script par Valentin Bloch      
 *
 */

using UnityEngine;

public class PlayerMovement : MonoBehaviour
{
    public float speed;
    private Rigidbody2D myRigidbody;
    private Vector3 change;

    // Start is called before the first frame update
    void Start()
    {
        myRigidbody = GetComponent<Rigidbody2D>();

    }

    // Update is called once per frame
    void Update()
    {
        change = Vector3.zero;
        change.x = Input.GetAxisRaw("Horizontal");
        change.y = Input.GetAxisRaw("Vertical");

        if (change != Vector3.zero)
        {
            MoveCharacter();
        }
    }

    void MoveCharacter()
    {
        myRigidbody.MovePosition(transform.position + change * speed * Time.deltaTime);
    }
}