Wii U secrets: The games seem to all have version numbers!
Fire up your copy of New Super Mario Bros. U and you'll see it right there on the title screen, next to the prompt imploring you to PUSH 2 TO START even if you are using the normal actual controller that game with the Wii U, on which there is no "2" anywhere. Version 1.1.0, it says! Did you know that other games also include these version numbers prominently? In Nintendo Land, all you have to do is go to the main menu, then click options.