From the introduction
This program was so popular that several other versions have appeared on the market. In order to keep ahead of the competition, the program has been re-written in machine language for fast graphics.
The program includes to excellent mazes. In Tunnel Vision, you view the maze from inside in perspective. If you get lost, the program provides a map showing your trail. In Kat and Mouse, you must find your way through the maze before the hungry Kat finds you.
Each maze has only one solution, and each is unique.