Object: Recreate the original setup.
 
At the start you see the numbers 1 to 16. Click the board to allow Zillions to randomize the image.
 
Only the four centre squares are sensitive for input. When you click one of them , the eight surrounding numbers will be cycled clockwise by 90 degrees at a time. (Each puzzle piece always stays with the correct side pointing up, though).
 
Variants 2, 3 have only two (four) piece types, namely coloured squares or butterflies, and are therefore somewhat easier to play. Note that these variants have an alternative piece set!
Variants 4, 5, 6: rotations is 45 degrees at a time instead of 90 degrees.
 
 
More freeware as well as real puzzles and games at my homepage http://karl.kiwi.gen.nz.