For the first step in designing my maze, I began by designing the outline of what shape I wanted my maze to be. I chose for it to be modeled after the Tardis from Doctor Who.
I then extruded the sketch 0.75 inches.
I spent a little while drawing out my maze, making sure that all of the channels were connected.
I then extruded the channels. Fortunately, all of my channels were connected, so I didn't have to worry about going back and checking to make sure everything was connected.
The Final Design
Routing the Maze
Load the G-code onto the computer, then use the X-Y-Z buttons to align the router bit with the very edge of the material. As soon as you set this position as (0,0), you can begin routing.