THE CUBIC SLIDING PUZZLE - realization Millie Maruani - original idea Jean-Paul Pannetier

This puzzle is a 3D version of the so-called Pouss-Pouss or Taquin 's game. It's made of cubic pieces, arranged as spiral stairs, from lighter to darker color.
The challenge is to reorder the pieces, after they have been mixed.You can choose for 9 or 16 pieces.

The game is in Google Play at this URL and in the App Store.