The 15-puzzle is a sliding puzzle that consists of a frame of numbered square tiles in random order with one tile missing. The object of the puzzle is to place the tiles in order by making sliding moves that use the empty space.

Features:
• Simple and beautiful design
• Fast and responsive interface
• Completely customizable colors
• Board sizes from 3x3 to 8x8
• No ads or in-app purchases
• Game Center leaderboards