Shuffler is a tile puzzle game where the objective is to arrange the numbered tiles in numerical order. Since this is a Metro application there's a huge focus on touch interaction so as to emulate a real tile puzzle game. The user has to slide the tiles into place and moving one tile can cause another tile to move. Shuffler contains top and bottom app bars with buttons for carrying out various tasks. The bottom app bar contains a single button which the user can tap/click to shuffle the tiles. The top app bar contains buttons for changing the application's look. The colored buttons on the left of the top app bar can be used to change the application's theme e.g. clicking/tapping on the green button changes the application's theme to green. The buttons on the right of the top app bar can be used to set or remove the application's wallpaper. Clicking/tapping on the Set Wallpaper button displays the file picker which enables the user to select an image file to use as the app's wallpaper.