that was a unique game, in that it was basically released in a finished state! i have never really added anything to it. it came with a set of characters with were all connected meaningfully and it would be difficult to add more -- mostly because of the password system.
thank you for your kind words about my new game! i don't know what my next game will be, but I love monster mind and I'd love to somehow recapture the magic of that game some day.