15 Puzzle Polygon

The n-puzzle include the 8 puzzle, the famous 15 puzzle, and with various names (Gem Puzzle, Boss Puzzle, Game of Fifteen, Mystic Square, etc.). It is a sliding puzzle that consists of a frame of numbered square tiles in random order with one tile missing. If the size is 3x3, the puzzle is called the 8-puzzle or 9-puzzle, and if 4x4, the puzzle is called the 15-puzzle or 16-puzzle. The object of the puzzle is to place the tiles in order by making sliding moves that use the empty space.
This APP extended the classic 15-Puzzle to triangle and hexagon. Added fixed blocks and irregular board mode. There are Three modes, THREE shapes. Each have SIX difficulty.
Main features:
Three play ways: Classic, Irregular and Fixed block.
Three shapes: square, triangle and hexagon.
Six difficulty: from small to large, from easy to difficult.
Infinite level, fragmented time, play if you want.
Simple operation and beautiful interface.