Thanks for the kind words!
I am sorry to tell you, there is currently no way to create your own mazes.
I've honestly never thought of adding a maze editor... That is something I'll have to think about though. It's a very intriguing idea.
Currently, all of the mazes are created by hand. Including the paths, obstacles, and colors. I would need to make a pretty smart and easy to use editor. It may be something for a later date after the finished release though. Thank you!