// Delays quitting for 2 seconds and 
// loads the finalsplash level during that time.

var showSplashTimeout : float = 2.0;
private var allowQuitting : boolean = false;

function Awake () {
    // This game object needs to survive multiple levels
    DontDestroyOnLoad (this);
}

function OnApplicationQuit () {
    // If we haven't already load up the final splash screen level
    if (Application.loadedLevelName.ToLower() != "finalsplash")
        StartCoroutine("DelayedQuit");
    
    // Don't allow the user to exit until we got permission in 
    if (!allowQuitting)
        Application.CancelQuit();
}

function DelayedQuit () {
    Application.LoadLevel("finalsplash");
    
    // Wait for showSplashTimeout
    yield WaitForSeconds(showSplashTimeout);
    
    // then quit for real
    allowQuitting = true;
    Application.Quit();
}

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
    public float showSplashTimeout = 2.0F;
    private bool allowQuitting = false;
    void Awake() {
        DontDestroyOnLoad();
    }
    void OnApplicationQuit() {
        if (Application.loadedLevelName.ToLower() != "finalsplash")
            StartCoroutine("DelayedQuit");
        
        if (!allowQuitting)
            Application.CancelQuit();
        
    }
    IEnumerator DelayedQuit() {
        Application.LoadLevel("finalsplash");
        yield return new WaitForSeconds(showSplashTimeout);
        allowQuitting = true;
        Application.Quit();
    }
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

    public showSplashTimeout as single = 2.0F

    private allowQuitting as bool = false

    def Awake():
        DontDestroyOnLoad(self)

    def OnApplicationQuit():
        if Application.loadedLevelName.ToLower() != 'finalsplash':
            StartCoroutine('DelayedQuit')
        if not allowQuitting:
            Application.CancelQuit()

    def DelayedQuit() as IEnumerator:
        Application.LoadLevel('finalsplash')
        yield WaitForSeconds(showSplashTimeout)
        allowQuitting = true
        Application.Quit()