This is a practise andriod application. The n-­‐puzzle is a game known by a variety of names: Game of Fifteen, 8-­‐puzzle, 15-­‐puzzle, Mystic Square, and others. All the names refer to the same game, however: a two-­‐dimensional puzzle with one empty space into which some numbered tiles can slide horizontally or vertically to occupy. The goal is to arrange the board from smallest to largest