I wrote my bachelor's thesis about threedimensional cyclic dungeon generation. The thesis is available on github:
In the thesis I present a strategy to generate a grid-based threedimensional dungeon layout from a set of construction rules. These rules are chosen in such a way that the resulting dungeon contains cyclic structures, such as a return to the entrance, key/lock cycles and shortcuts.
The corresponding Unity implementation is an editor extension that assembles a complete, playable dungeon inside the editor or at runtime from predefined level pieces. The extension is highly configurable and can potentially generate all kinds of structures, not just dungeons.
A bitsy game about pulling teeth.
Bullet hell game for ludum dare 34.
A cellular automaton that is also a game.
More games, including collabs with others, on my itch.io page: https://nilsgawlik.itch.io