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Guide a miniature robotic Mario, Princess Peach, Donkey Kong or – Mario's main squeeze in the original Donkey Kong – Pauline to each level's exit by dragging and dropping pieces of pipe. It's a modern twist on ancient favourite, Pipemania, and while it starts with a gentleness that's almost patronising, its puzzles quickly acquire the power to bend minds, adding bombs, magic tiles, pivoting corners, springs, catapults, warp pipes and conveyer belts. Four modes and 180 individual puzzles along with Nintendo's usual lofty production values make for a compelling challenge.