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Mario spin-off Captain Toad: Treasure Tracker is due to arrive on Wii U early next month. In the meantime, here's a promo video from Nintendo showing about 10 minutes of gameplay, as well as an adult and child figuring out some of the puzzles.
Captain Toad: Treasure Tracker stars the eponymous character who appeared in Super Mario 3D World. It features multiple gravity-focused puzzle platforming stages. As in Super Mario 3D World, Captain Toad still has plenty of constraints that limit his adventuring skills (he can't jump, for example) but he's able to investigate levels from first-person perspective using the Wii U GamePad.