This requires Silverlight 1.1 Alpha, available here. If you only have Silverlight 1.0 installed, you'll get a wacky error message (AG_E_RUNTIME_MANAGED_ACTIVATION).
Click on the maze to start, then drive the blue dot to the pink dot.Use the arrow keys to move, or the following if you'd prefer:
UP: W or 8
LEFT: A or 4
DOWN: S or 2
RIGHT: D or 6
Each time you solve a maze, you get a harder one, until they're so microscopic you run out of pixels.