Скрипт движения игрока по клавишам WSAD:

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

public class PlayerController : MonoBehaviour
{
    public float speed = 5f;
    public float rotate = 180f;


    // Start is called before the first frame update
    void Start()
    {
        Debug.Log("Привет, Мир");
    }

    // Update is called once per frame
    void Update()
    {
        if (Input.GetKey(KeyCode.W))
        {
            transform.Translate(new Vector3(0, 0, speed * Time.deltaTime));
        }

        if (Input.GetKey(KeyCode.S))
        {
            transform.Translate(new Vector3(0, 0, - speed * Time.deltaTime));
        }

        if (Input.GetKey(KeyCode.A))
        {
            transform.Rotate(new Vector3(0, - rotate * Time.deltaTime, 0));
        }

        if (Input.GetKey(KeyCode.D))
        {
            transform.Rotate(new Vector3(0, rotate * Time.deltaTime, 0));
        }

    }
}