Fix for unsolvable combinations issue

Fixed the unsolvable combinations issue by changing the shuffle mechanism from a mathematically-based parity checking one to a brute-force-based one that shuffles by making a random walk of the blank tile.

Also, we added tile order display and reshuffle on demand options to the puzzle board for convenience.

If you still encounter any unsolvable combinations (which should be practically impossible now with the random walk shuffle mechanism), just make the number labels visible, take a screenshot, and send it to us so we can understand and solve the problem.

Enjoy the enhanced challenge and seamless gameplay.