I mentioned the Cave of Illusions a while ago. This post will detail some of my original notes for the location and its associated roguelike project, as well as some of my new plans for the entire thing.
The original Cave of Illusions project only featured one dungeon (the titular Cave of Illusions), which was meant to have as many as 65,535 floors. It featured a single player character, whose gender you could choose (note that gender only affected dialogue). Two NPCs, a mother and her daughter, helped guide you in your quest to the bottom of the Cave of Illusions.