Spin and swap! A cousin of Rubik's cube, M12 is a puzzle you can start working on immediately!
It's so easy ... and yet ...
Swap the pairs of numbers on same-colored balls
Spin the ring of numbers
Solve by moving back to home position
One home position -- 95039 other positions
Get five numbers in position and the puzzle is solved!
Currently available for the iPhone/iPad/iPod. Android version coming soon!
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