Game Development with XNA Framework

No source / assets folders in download ????

Hello!
There are some bugs in this article.
1. In 'Task 3 – XNA Game Studio Game Loop' there are no background and title after steps 1-4, there is violet back only and menu items.
2.  There is no way to go from game to menu. In gameplay (when I see tank, aliens etc) I try to press 'Back' button (left arrow in the Emulator) and nothing happens. The only way is to press 'Start' button in the Emulator. I think it's trouble.
Thank you!

I'm sorry, but after learning this lesson I think that it's far from ideal. I can't change menu items in Emulator by keyboard (even if I press Break key), only by mouse, but in this case I don't see highlighted menu item (painted in yellow). There is very much code in this lesson, but it's difficult to understand, not structurized. I can't understand what is the meaning of some code lines, variables and properties. I'm so sorry for my criticims, but I really can't understand this lesson fully.

The game state sample link is broken.  
I found the following link: http://create.msdn.com/en-US/education/catalog/sample/game_state_management
But that link doesn't contain any of the content that this tutorial refers to.  Please can you upload a zip with the required content.

I found the image assets to not be in this source download, but in the full training kit.  The other code may also be there, so I am looking....  http://go.microsoft.com/?linkid=9723028