Не работает ротатион

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

public class NewBehaviourScript : MonoBehaviour
{
    public Vector2 MovementDirection;
    public float Speed;

    private void Start () {
        MovementDirection.Normalize();

    private void Update()
    {
        if (Input.GetKeyDown(KeyCode.Space) || Input.GetKeyUp(KeyCode.Space)) 
            MovementDirection.y *= -1;

        if (Input.GetKeyDown(KeyCode.Space))
            Quaternion.Euler(0, 0, 30);

        transform.Translate(MovementDirection.normalized * Speed * Time.deltaTime);
    }
}