it works! Thanks ArenMook

can i ask two more questions (so that i dont have to create more new topics)
1.)
i'm make a game to Android and iOS
i built my game to test in many Android devices (many different specs) such as Galaxy Nexus, S2, Nexus 7, Nexus 5. All of them can run the game (though most of them are having lag issue in GameScene except Nexus 5)
the problem is, when i build my game to iOS and test them in iPad Mini and iPad2, my game crashes after loading from WorldScene to GameScene.
I guess the reason is about memory usage (?), or is there any possibles causes ?

2.)
as i mentioned about testing the game in many Android devices and it works well in WorldScene except in Nexus 5 (the best spec of all devices) textures are messed up and duplicated (see my attachment).
Is there any ways to fix them (both problems) ?
Thanks again and really appreciate in your help,
Spacez