Move blocks on a circle!. Sounds more interesting than blocks in a box? So this is a reshaped version of the classic puzzle game 15 Puzzle (also called Gem Puzzle, Boss Puzzle, Game of Fifteen, Mystic Square and whatever else). The goal of this sliding puzzle game is to shift blocks and put them in a correct order on circles (numbered couter-clockwise and inside-out, there is a depiction in a game). To move a block just tap on it and it will slide to an adjacent free position (if there is one). 15 Puzzle is a well known challenging brain teaser and this twisted version has the same game logic but different unique mechanics! Controls and graphics are clean and very simple. So blast your mind and challenge yourself with this mental game!