玩家输入在统一中无法正常工作

我试图重现《艾萨克在团结中的束缚》的各个方面(只是作为一种学习练习,而不是整个游戏)。我已经创建了一个脚本,使Isaac能够使用WASD键移动,并使用箭头键射出眼泪。虽然WASD的移动效果很好,但按下箭头键会使Isaac同时移动和射击。理想情况下,箭头键只能用来发射眼泪,而不能移动艾萨克。我正在寻求帮助来解决这个问题。如果这是一个简单的问题,请道歉,并为糟糕的英语感到抱歉

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

public class IsaacMovements : MonoBehaviour
{
    public float speed = 40f;
    public Rigidbody2D projectilePrefab;
    public float projectileSpeed = 10f;

    private Rigidbody2D rb;

    // Start is called before the first frame update
    void Start()
    {
        rb = GetComponent<Rigidbody2D>();
        if (rb == null)
        {
            Debug.LogError("Rigidbody2D component is not attached to the GameObject.");
        }
    }

    // Update is called once per frame
    void Update()
    {
        Move();

        if (Input.GetKeyDown(KeyCode.LeftArrow) || Input.GetKeyDown(KeyCode.RightArrow) ||
            Input.GetKeyDown(KeyCode.UpArrow) || Input.GetKeyDown(KeyCode.DownArrow))
        {
            Shoot();
        }
    }

    void Move()
    {
        float horizontalInput = Input.GetAxisRaw("Horizontal");
        float verticalInput = Input.GetAxisRaw("Vertical");

        Vector2 movement = new Vector2(horizontalInput, verticalInput).normalized;
        rb.velocity = movement * speed;
    }

    void Shoot()
    {
        if (Input.GetKey(KeyCode.LeftArrow))
            Fire(Vector2.left);
        else if (Input.GetKey(KeyCode.RightArrow))
            Fire(Vector2.right);
        else if (Input.GetKey(KeyCode.UpArrow))
            Fire(Vector2.up);
        else if (Input.GetKey(KeyCode.DownArrow))
            Fire(Vector2.down);
    }

    void Fire(Vector2 direction)
    {
        Rigidbody2D projectileInstance = Instantiate(projectilePrefab, transform.position, Quaternion.identity);
        projectileInstance.velocity = direction * projectileSpeed;
    }
}

我试着在整个过程中广泛地更改代码,但似乎什么都不起作用。我还试着用不同的键代替箭头键进行射击,但仍然没有得到想要的结果。