If you don't have a Wii U, then why did you look up a project specifically designed for Wii U? If you want a Wii U experience without purchasing a Nintendo Wii U, then grab your phone and grab one of those backbone-like controllers and connect it to your phone. And then, configure Cemu, the Wii U emulator, in such a way that you can use your phone as a Wii U gamepad. After which, you should be able to play this in the emulator.