add header yaml for samples gallery

LivePlayer/XamagonXuzzleLP/readme.md

@@ -1,22 +1,27 @@
+---
+name: Xamarin.Forms - Xuzzle game
+description: "A variation of the classic 14-15 slider puzzle game, build with Xamarin.Forms"
+page_type: sample
+languages:
+- csharp
+products:
+- xamarin
+urlFragment: liveplayer-xamagonxuzzlelp
+---
 Xuzzle
 ======
 
 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 spell out the text
-"{XAMARIN.FORMS}".
+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. 
+![Mobile app slider puzzle of Xamarin logo](Screenshots/app.png)
+
+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.
-
-
-Author
-------
-
-Charles Petzold

LivePlayer/readme.md

@@ -1,9 +1,5 @@
-Xamarin Live Player Samples
-===========================
+# Xamarin.Forms cross-platform samples
 
-Samples for trying out Xamarin Live Player. Refer to the [documentation](https://docs.microsoft.com/xamarin/tools/live-player/) for more information.
-
-## Xamarin.Forms
-
-* Basic Calculator
-* RPN Calculator
+- Basic Calculator
+- RPN Calculator
+- Xuzzle game