Level 435: Invisible pretzel walls
In Level 435, the pretzel walls do not appear on the game board until they're broken. This makes the level confusing because it's not initially clear why certain pieces can't be moved on the board. I'm using an iPad Air 2 (iOS 9.3.2). The first screenshot attached shows how the game board looks when you begin the level. The second screenshot shows an attempt to move a blue piece, which won't move because it's blocked by a pretzel wall -- but the wall isn't actually visible.
Sorry to hear that! Can you uninstall and reinstall the game and let the game load for a couple of minutes to see if the pretzels show up? Please let me know if that helps.
I was able to beat the level. Once I get to the next "ask friends" level, where you have to wait 22 hours to play, I'll uninstall and reinstall before replaying 435 to see if that corrects the issue.