Nuclex - The Art of XNA Game Programming

Ball Race (Freeware!)

Ball Race is a challenging dexterity game where you have to guide a small metal ball through a series of mazes. But instead of exercising direct control over the ball, your only way of making the ball move is to tilt the maze board and let gravity do its work. Includes a 10 level challenge mode where you can try to achieve the best overall time and the option to create your own custom levels in a simple text editor such as windows notepad.

Includes the full game with 10 challenge levels, a custom level that shows you how to build your own mazes with a text editor and the complete source code in C# for programmers!