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The Wii U is only a day old, but that’s plenty of time for Nintendo to get into some trouble.

A hidden debug menu inside the Wii U, which Nintendo called a “mock up” menu, revealed Miiverse communities for titles like Yoshi’s Land Wii U, Soul Hackers, and Resident Evils. Nintendo has since locked down access to this backend interface, but not before one Wii U user snagged some screenshots.

NeoGAF forum user Trike revealed that he could access this admin-level content by pressing the GamePad’s “X” button while hovering over the “exit” prompt in the Wii U’s social-networking service, Miiverse. That no longer works for him, as Nintendo has apparently plugged that leak.

Nintendo released the following statement to Games Industry International:

“It has come to our attention that some people were able to access a mock-up menu on Miiverse following the launch of Wii U in the US. Please note that this was only a mock-up menu and has now been removed and is not accessible.”

That suggests that the Miiverse communities were simply created as tests for the system. The “Resident Evils” even suggests that the designers were originally playing around with franchise-wide communities.

In 1995, Nintendo released Super Mario World 2: Yoshi’s Island for the Super Nintendo. It is a 2D platformer that follows the adventures of Yoshi the dinosaur as he attempts to rescue a baby version of Mario. Many fans and critics consider it one of the best games in its genre. The publisher released a pair of sequels, 1997’s Yoshi’s Story for the Nintendo 64 and 2006’s Yoshi’s Island DS. Both failed to live up to their predecessor.

Nintendo has never released anything called Yoshi’s Land.