Simple camera move with zooming using mouse wheel code for Unity Engine

CameraMove.cs

//************** REAL GAMES STUDIO ***************
//************************************************
//realgamesss.weebly.com
//gamejolt.com/@Real_Game
//realgamesss.newgrounds.com/
//real-games.itch.io/
//youtube.com/channel/UC_Adg-mo-IPg6uLacuQCZCQ
//************************************************

using UnityEngine;

public class CameraMove : MonoBehaviour
{
    [Header("Camera")]
    public float speed = 10.0f;

    Vector3 camPos;

    [Header("Zoom")]
    public float minZoom = 5.0f;
    public float maxZoom = 250.0f;

    float zoom;

    void Update()
    {
        Move();

        transform.position = camPos;
        camPos = transform.position;

        Zoom();

        zoom = Mathf.Clamp(zoom, minZoom, maxZoom);
        GetComponent<Camera>().orthographicSize = zoom; 
    }

    void Move()
    {
        if (Input.GetKey(KeyCode.W))
        {
            camPos.y += speed * Time.deltaTime;
        }
        if (Input.GetKey(KeyCode.S))
        {
            camPos.y -= speed * Time.deltaTime;
        }
        if (Input.GetKey(KeyCode.A))
        {
            camPos.x -= speed * Time.deltaTime;
        }
        if (Input.GetKey(KeyCode.D))
        {
            camPos.x += speed * Time.deltaTime;
        }
    }

    void Zoom()
    {
        if (Input.GetKey(KeyCode.KeypadMinus))
        {
            zoom -= speed * Time.deltaTime;
        }
        if (Input.GetKey(KeyCode.KeypadPlus))
        {
            zoom += speed * Time.deltaTime;
        }

        if (Input.mouseScrollDelta.y > 0)
        {
            zoom -= speed * Time.deltaTime * 10f;
        }
        if (Input.mouseScrollDelta.y < 0)
        {
            zoom += speed * Time.deltaTime * 10f;
        }
    }
}