Nintendo has released a new trailer for Super Mario Maker to show off the new Key Update, which should hit the Wii U on March 9th.
The free update adds keys and key doors to the mix, which provide all sorts of new challenges players can craft into their own Super Mario Bros. levels. The update will also add a Super Expert Mode, which unlocks after you beat Expert Mode. Finally, 12 new Mystery Mushroom costumes have been added to the 100 Mario Challenge.
Head on up above to see the changes that this update will add to Super Mario Maker.
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