Unity 3D State Manager: Gamestart C# Script

/*
    Unity 3D: Game Start Script Source for State Manager

    Copyright 2012 FIZIX Digital Agency
    http://www.fizixstudios.com

    For more information see the tutorial at:
    http://www.fizixstudios.com/labs/do/view/id/unity-game-state-manager


    Notes:
        This script is a basic GUI script to create a new game state; you will need the statemanager.cs
        script.
*/

using UnityEngine;
using System.Collections;

public class gamestart : MonoBehaviour
{


    // Our Startscreen GUI
    void OnGUI ()
    {
        if (GUI.Button (new Rect (30, 30, 150, 30), "Start Game"))
        {
            startGame();
        }
    }

    private void startGame()
    {
        print("Starting game");

        DontDestroyOnLoad(gamestate.Instance);
        gamestate.Instance.startState();
    }
}