UnityでJump King風ゲームを作るときに、カメラの挙動再現に苦戦しています

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

public class VerticalScrollCamera : MonoBehaviour
{
    public Transform player;
    private Camera mainCamera;

    void Start()
    {
        mainCamera = Camera.main;
    }

    void Update()
    {
        float cameraY = mainCamera.transform.position.y;
        float playerY = player.position.y;

        if (playerY > cameraY + 8)
        {
            mainCamera.transform.position = new Vector3(mainCamera.transform.position.x, cameraY + 16, mainCamera.transform.position.z);
        }
        else if (playerY < cameraY - 8)
        {
            mainCamera.transform.position = new Vector3(mainCamera.transform.position.x, cameraY - 16, mainCamera.transform.position.z);
        }
    }
}