// Standard method to create a button
    CCMenuItem *playButton = [CCMenuItemImage itemFromNormalImage:@"playOffButton.png" selectedImage:@"playOverButton.png" target:self selector:@selector(playButtonTapped:)];
    playButton.position = ccp(size.width/2 - 80, 170);
    [playButton setScale:0.7];

    CCMenuItem *optionsButton = [CCMenuItemImage itemFromNormalImage:@"optionsOff.png" selectedImage:@"optionsOver.png" target:self selector:@selector(optionsButtonTapped:)];
    optionsButton.position = ccp(size.width/2 + 80, 170);
    [optionsButton setScale:0.7];

    CCMenuItem *gamecenterAchievementsButton = [CCMenuItemImage itemFromNormalImage:@"achievementsOffButton.png" selectedImage:@"achievementsOverButton.png" target:self selector:@selector(gamecenterAchievementButtonTapped:)];
    gamecenterAchievementsButton.position = ccp(size.width/2 - 80, 122.5);
    [gamecenterAchievementsButton setScale:1];
    [gamecenterAchievementsButton setScale:0.7];

    CCMenuItem *gamecenterLeaderboardButton = [CCMenuItemImage itemFromNormalImage:@"leaderboardOffButton.png" selectedImage:@"leaderboardOverButton.png" target:self selector:@selector(gamecenterLeaderboardButtonTapped:)];
    gamecenterLeaderboardButton.position = ccp(size.width/2 + 80, 122.5);
    [gamecenterLeaderboardButton setScale:1];
    [gamecenterLeaderboardButton setScale:0.7];

    CCMenuItem *creditsButton = [CCMenuItemImage itemFromNormalImage:@"creditsOffButton.png" selectedImage:@"creditsOverButton.png" target:self selector:@selector(creditsButtonTapped:)];
    creditsButton.position = ccp(size.width/2, 75);
    [creditsButton setScale:1];
    [creditsButton setScale:0.7];

    mainMenu = [CCMenu menuWithItems:playButton, optionsButton, gamecenterLeaderboardButton, gamecenterAchievementsButton, creditsButton, nil];
    mainMenu.position = CGPointZero;
    [self addChild:mainMenu];