Unityでキーボード入力で3Dプレイヤーを動かす方法

using UnityEngine;

[RequireComponent(typeof(CharacterController))]
public class PlayerKeyboardMove : MonoBehaviour
{
    [SerializeField] private float moveSpeed = 4f;
    [SerializeField] private float turnSpeed = 12f;

    private CharacterController controller;

    private void Awake()
    {
        controller = GetComponent<CharacterController>();
    }

    private void Update()
    {
        Vector3 input = new Vector3(
            Input.GetAxisRaw("Horizontal"),
            0f,
            Input.GetAxisRaw("Vertical")
        );

        if (input.sqrMagnitude > 1f)
        {
            input.Normalize();
        }

        Vector3 worldMove = transform.TransformDirection(input);
        controller.SimpleMove(worldMove * moveSpeed);

        if (worldMove.sqrMagnitude > 0.001f)
        {
            Quaternion targetRotation = Quaternion.LookRotation(worldMove);
            transform.rotation = Quaternion.Slerp(
                transform.rotation,
                targetRotation,
                turnSpeed * Time.deltaTime
            );
        }
    }
}