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.
Creating the Game - building the Board, creating the moves, counting the steps.
GUI - package that display and interactes with the user on the screen
Shuffiling the Board and validating that the board is solvable.
