A new parody app about Donald Trump is a hit, climbing to No. 5 on the list of most downloaded apps in the U.S. iTunes App Store. The objective of the game is to build a wall (as “huuuge” as you can). You’re not building the wall on the U.S.-Mexico border, however. The wall is being built in front a building that looks like the White House with Trump’s name plastered across it. “This game and all characters in it are entirely fictional,” is the message you see when you open up the “Trump’s Wall” app. But everything on the...