The switch button in my zigzag style game works only on the first World UI. If I copy that World Background as well as its World UI for a separate Game Mode, the switch button stops working for these new Worlds. Is it a bug affecting BB2? It's the only thing we need to get fixed before we publish the game, since without it our game would make no sense.
Can your reproduce it ? if so, I suggest you to email BuildBox support team with bbdoc to get hotfixes asap for any annoying bugs.