Making an AirPlane follow mouse

Hi! I am trying to make an AirPlane in my game, but i am having some troubles. I tried to make it rotate, but it wouldn’t be the best idea to make all the controls be in the keyboard, so i am trying to make something with the mouse.

I wanted to make something like in World of Warplanes:


I already made the machine guns for the airplane, and i made a simple script that make the airplane go forward everytime, and make possible for players to MOVE to left and right using A and D. Here’s the script:

using UnityEngine;
using System.Collections;

public class PlaneControl : MonoBehaviour
{

    public float speed = 1f;


    void Update()
    {
        Vector3 moveDir = Vector3.zero;
        transform.position = transform.position + ((transform.rotation * transform.forward) * speed * Time.deltaTime);
        moveDir.x = Input.GetAxis("Horizontal"); // get result of AD keys in X
        transform.position += moveDir * speed * Time.deltaTime;
    }
}

It’s C#. How do i make my plane ROTATE to left and right and ROTATE up and down using the mouse? Can someone help me? I need to do this and i don’t know how, i always get confused about those things because the mouse can’t be referenced like the other objects because in reality it isn’t part of the game, and i don’t know how to make an input for it or something =(

There are inputs set up by default in Unity for mouse movement.

transform.Rotate (Vector3.right * rotationSpeed * Input.GetAxis ("Mouse X"));    //Uses the left/right mouse movement to rotate the object.

You can find all available inputs in the Input window (Edit>Project Settings>Input).