Luckily, I never experienced any UI breaking bugs.
At first, I thought I was supposed to freeze certain items to let people get across by jumping on top of them, but once I realized that wasn't the case, the the optimal strategy just became swiping back and forth and freezing everything. Are you supposed to be able to freeze large groups of objects in place by clicking and holding?
Also, this game works on mobile. Don't ask me how I know this.