Swapi puzzle game

2.2: Updated to target Android SDK 33.
2.1: Bug fix.
2.0: Changed icon. Fixed bug in 4 x 4 game.
1.9: Added an option on the menu to play a "four by four" game.
1.8: Show tiles with outline and shadow.
1.7: Prevent moves when 0 moves remaining.
1.6: Only show the "New game" button when the puzzle has been solved.
1.5: Improvements to game play.
1.4: Bug fixes and improvements.
1.0: Initial version.