Antony Lavelle's black-and-white puzzle-platformer series.
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The first and original shift, which as many believe is just another maze game. Run and jump as needed< and you'll be fine,they say.

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Run through the maze, run for your life! If you see something you don't expect moving towards you, it is going to kill you. What a mess!

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Run, jump, and don't die as long as you can.

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The black-and-white puzzle platformer returns for its most elaborate chapter yet.