When I entered the doors of the building, an approximately 7-foot Piranha Plant greeted me. Inside, I saw large question block cushions scattered throughout and 25 Wii U stations. Off in the corner was a Mario mascot, posing for photos in front of a big green pipe. If you thought I was in Nintendo Land, you'd be wrong. I was in Facebook's Menlo Park, California, offices. It was the second day of a two-day hackathon collaboration with Nintendo, where employees had the opportunity to create levels with the upcoming game Super Mario Maker. And the ultimate prize? The winning level design would be available to download when the game launches.