Rust-like mini copter code (Unity)

CopterControl.cs

using System.Collections.Generic;
using UnityEngine;

public class CopterControl : MonoBehaviour
{

    public float thrust;
    public ForceMode forceMode;
    public float rotSpeed;

    void Update()
        
    {
        if(Input.GetKey(KeyCode.Z))
            {
            gameObject.GetComponent<Rigidbody>().AddRelativeForce(Vector3.up*thrust,forceMode);
            }
        if(Input.GetKey(KeyCode.S)){gameObject.GetComponent<Rigidbody>().AddRelativeForce(-Vector3.up*thrust,forceMode);}
        if(Input.GetKey(KeyCode.Q)){gameObject.GetComponent<Rigidbody>().AddTorque(Vector3.up*-rotSpeed,forceMode);}
        if(Input.GetKey(KeyCode.D)){gameObject.GetComponent<Rigidbody>().AddTorque(Vector3.up*rotSpeed,forceMode);}
      
        gameObject.transform.Rotate(Vector3.right,Input.GetAxis("Mouse Y"), Space.Self);
        gameObject.transform.Rotate(-Vector3.forward,Input.GetAxis("Mouse X"), Space.Self);

        if(Input.GetButton("Fire1")){CopterFire();} 
        
    }