"Zen Fifteen" is new version of classic "15 puzzle".
(Also called Gem Puzzle, Boss Puzzle, Game of Fifteen,
Mystic Square and many others. See the wiki:
A bit about the features:
Our version has no timer. So play quietly, don't think about the time.
It has no moves counter. Don't think about amount of spent turns.
There are stones from rock garden and tranquil relaxation track -).
We hope our implementation of 15-puzzle will enjoy you!