캐릭터가 움직이지 않아요ㅠㅠ

using System.Collections;

using System.Collections.Generic;

using UnityEngine;

public class PlayerController : MonoBehaviour

{

    // Start is called before the first frame update

    void Start()

    {

    }

    // Update is called once per frame

    void Update()

    {

        if (Input.GetKey(KeyCode.W))

            transform.position += new Vector3(0.0f, 0.0f, 1.0f);

        if (Input.GetKey(KeyCode.S))

            transform.position -= new Vector3(0.0f, 0.0f, 1.0f);

        if (Input.GetKey(KeyCode.A))

            transform.position -= new Vector3(1.0f, 0.0f, 0.0f);

        if (Input.GetKey(KeyCode.D))

            transform.position += new Vector3(1.0f, 0.0f, 0.0f);

    }

}

코드 어디가 잘못된걸까요?