Update Walkthrough.md

GoneBananas/Walkthrough.md

@@ -4,7 +4,7 @@ This tutorial shows how to build a game using CocosSharp, a game framework that
 
 ## Getting CocosSharp
 
-CocosSharp is available as a PCL in [NuGet](https://github.com/mono/CocosSharp/wiki/NuGet-Packages). Additionally, the CocosSharp source can be pulled from github [here](https://github.com/mono/CocosSharp).
+CocosSharp is available as either PCLs or platform specific libraries in [NuGet](https://github.com/mono/CocosSharp/wiki/NuGet-Packages). Additionally, the CocosSharp source can be pulled from github [here](https://github.com/mono/CocosSharp).
 
 ## Game Walkthrough
 
@@ -709,4 +709,4 @@ You can now run the game and play it on either the simulator or a device. Congra
 
 ## Summary
 
-In this walkthrough we created a game using CocosSharp. We created scenes with layers to display the game and manage game logic. In doing so, we covered how to add sprites and animate them with actions, handle touch, add sound effects and transition between scenes. We also added particle systems and parallax to include interesting visual effects, and physics simulation to add more realistic animation to the game.
+In this walkthrough we created a game using CocosSharp. We created scenes with layers to display the game and manage game logic. In doing so, we covered how to add sprites and animate them with actions, handle touch, add sound effects and transition between scenes. We also added particle systems and parallax to include interesting visual effects, and physics simulation to add more realistic animation to the game.