How do I add a save function to my pause menu?

Questions & Answers
1

In my pause menu I have a series of button but i want to add a save button to it that will save everything so i dont keep losing everything but I have no idea how to do this.

I have included my script below, any idea how to do this anyone ???

var skin:GUISkin;
 
private var gldepth = -0.5;
private var startTime = 0.1;
 
private var savedTimeScale:float;
private var pauseFilter;

var mainObjective:String[]=[
	"- Get to room 8 for English lesson",
	"- When the fire alarm goes off,",
	"  make your way to the playground in the time"];
	
	var subObjective:String[]=[
	"Collect 10 Keys",
	"Make first steps"];

enum Page {
	None,Main,Options,Objective,MainMenu
}
 
private var currentPage:Page;
 
function Start() {
	Time.timeScale = 1.0;
	PauseGame();
}
function LateUpdate () {
	if (Input.GetKeyDown("escape")) {
		switch (currentPage) {
			case Page.None: PauseGame(); break;
			case Page.Main: if (!IsBeginning()) UnPauseGame(); break;
			default: currentPage = Page.Main;
		}
	}
}
 
function OnGUI () {
	if (skin != null) {
		GUI.skin = skin;
	}
	if (IsGamePaused()) {
		switch (currentPage) {
			case Page.Main: PauseMenu(); break;
			case Page.Options: ShowToolbar(); break;
			case Page.Objective: ObjectiveToolbar(); break;
			case Page.MainMenu: OpenLevel("MainMenu"); break;
		}
	}	
}

private var toolbarInt:int=0;
private var toolbarStrings: String[]= ["Audio","Graphics"];
private var obToolbarStrings: String[]= ["Main Objective","Sub Objective"];
 
function ShowToolbar() {
	BeginPage(400,300);
	toolbarInt = GUILayout.Toolbar (toolbarInt, toolbarStrings);
	switch (toolbarInt) {
		case 0: VolumeControl(); break;
		case 1: Qualities(); QualityControl(); break;
	}
	EndPage();
}

function ObjectiveToolbar() {
	BeginPage(400,300);
	toolbarInt = GUILayout.Toolbar (toolbarInt, obToolbarStrings);
	switch (toolbarInt) {
		case 0: MainObjective(); break;
		case 1: SubObjective(); break;
	}
	EndPage();
}

function MainObjective() {
	for (var credit in mainObjective){
		GUILayout.Label(credit);
		}
}

function SubObjective() {
	for (var cred in subObjective){
		GUILayout.Label(cred);
		}
}
 
function ShowBackButton() {
	if (GUI.Button(Rect(20,Screen.height-50,70,20),"Back")) {
		currentPage = Page.Main;
	}
}
 
function Qualities() {
        GUILayout.Label(QualitySettings.names[QualitySettings.GetQualityLevel()]);
}
 
function QualityControl() {
	GUILayout.BeginHorizontal();
	if (GUILayout.Button("Decrease")) {
		QualitySettings.DecreaseLevel();
	}
	if (GUILayout.Button("Increase")) {
		QualitySettings.IncreaseLevel();
	}
	GUILayout.EndHorizontal();
}
 
function VolumeControl() {
	GUILayout.Label("Volume");
	AudioListener.volume = GUILayout.HorizontalSlider(AudioListener.volume,0.0,1.0);
}
 
function BeginPage(width,height) {
	GUILayout.BeginArea(Rect((Screen.width-width)/2,(Screen.height-height)/2,width,height));
}
 
function EndPage() {
	GUILayout.EndArea();
	if (currentPage != Page.Main) {
		ShowBackButton();
	}
}
 
function IsBeginning() {
	return Time.time < startTime;
}
 
 
function PauseMenu() {
	BeginPage(200,200);
	if (GUILayout.Button (IsBeginning() ? "Play" : "Continue")) {
		UnPauseGame();
	}
	if (GUILayout.Button ("Options")) {
		currentPage = Page.Options;
	}
	if (GUILayout.Button ("Objective")) {
		currentPage = Page.Objective;
	}
	if (GUILayout.Button ("Main Menu")) {
		currentPage = Page.MainMenu;
	}
	EndPage();
}
 
function PauseGame() {
	savedTimeScale = Time.timeScale;
	Time.timeScale = 0;
	AudioListener.pause = true;
	if (pauseFilter) pauseFilter.enabled = true;
	currentPage = Page.Main;
}
 
function UnPauseGame() {
	Time.timeScale = savedTimeScale;
	AudioListener.pause = false;
	if (pauseFilter) pauseFilter.enabled = false;
	currentPage = Page.None;
}
 
function IsGamePaused() {
	return Time.timeScale==0;
}
 
function OnApplicationPause(pause:boolean) {
	if (IsGamePaused()) {
		AudioListener.pause = true;
	}
}

function OpenLevel(level : String){
	Application.LoadLevel(level);
	UnPauseGame();
}
2

As @whydoidoit mentioned, you can use Unity Serializer:

You can use Unity Serializer or write your own custom script or some other asset. You can also get Unity Serializer on the Asset Store (for free).

You can also use PlayerPrefs, which is simpler, but not recommended if you’re storing a whole bunch of information.

Saving your game is a very in-depth topic with a lot of discussion here and on the forums. There are some best practices, but there is no ‘right way’ to do it. Try doing some searches on the forum to see what people have discussed there.