az_tank_remake/Assets/Scripts/PlayerMovement.cs

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

public class PlayerMovement : MonoBehaviour
{
    public float movespeed = 5f;

    public Rigidbody rb;
    Vector3 movement;
    // Update is called once per frame

    void Update()
    {
        //Input
        movement.x = Input.GetAxisRaw("Horizontal");
        movement.y = Input.GetAxisRaw("Vertical");
        movement.z = 0;
    }

    void FixedUpdate() {
        //Movement
        rb.MovePosition(rb.position + movement * movespeed * Time.fixedDeltaTime);
    }
}