Xamarin.Forms - Xuzzle picture game
This is a variation of the classic 14-15 puzzle. On the early Mac, the 14-15 program was called PUZZLE. In early Windows, it was the only sample application for Microsoft Pascal for Windows 1.0, where it was called MUZZLE (for "Microsoft Puzzle"). This is the Xamarin.Forms version, so it's called Xuzzle, and the 15 tiles contain the Xamarin logo.
After pressing the Randomize button, just tap a tile to move it into an empty position. You can tap any tile in the row or column of the empty position to move one, two, or three tiles at once.
When you successfully complete the puzzle, you'll be rewarded with an animation.
This program is adapted from https://github.com/xamarin/xamarin-forms-book-samples/tree/master/Chapter22/XamagonXuzzle.