//Short.cs
using UnityEngine;

public class Short : MonoBehaviour
{
    public GameObject bullet;
    public float speed = 5;

    void Start()
    {}

    void Update()
    {
        //左键按下产生子弹
        if(Input.GetMouseButtonDown(0))
        {
            GameObject b = GameObject.Instantiate(bullet, transform.position, transform.rotation);
            Rigidbody rgd = b.GetComponent<Rigidbody>();
            rgd.velocity = transform.forward * speed;
        }
    }
}

//Movement.cs
using UnityEngine;

public class Movement : MonoBehaviour
{
    public float speed = 5;
    void Start()
    {}

    void Update()
    {
        float h = Input.GetAxis("Horizontal");  //x轴
        float v = Input.GetAxis("Vertical");    //y轴
        //Debug.Log(h);

        transform.Translate(new Vector3(h, v, 0) * Time.deltaTime * speed);
        //左右镜头移动速度1 m/s * speed
    }
}