samsheffield

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

public class JustOnce : MonoBehaviour
{

    // Has the thing already been done?
    private bool alreadyDone = false;

samsheffield

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement; // Add Scene Management

public class SwitchScene : MonoBehaviour
{

    // Important: Don't forget to add the next scene to your project's Build Settings

samsheffield

Here is a bonus Unity example for 2D Game Design F21. Let me know what else you need!
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(DE) ACTIVATING GAMEOBJECTS
Activate another GameObject on Start example: ShowOnStart.cs
Deactivate this GameObject on action (press space) example: HideOnAction.cs
Example Unity Project: https://drive.google.com/file/d/1qhtZZOpn83fH7DKXjtUJ8WmbGrK62By2/view?usp=sharing

Important: 
1. ShowOnStart requires the GameObject you want to activate deactivated in your scene (uncheck the top-left box in its Inspector)

samsheffield

using System;
using System.Collections;
using UnityEngine;

public class InkInteraction : MonoBehaviour
{
    // This is the ink JSON asset
    [SerializeField] private TextAsset inkJSON;
    
    // This is a reference to the Ink Manager script designed to run the story