I'm working on one of new level themes in Teemu. It's a maze type with 2x2 corridors. This is an example of current generation:
It's decent, but still needs some work. The way diggers work can be fine tuned to produce different types of mazes. There is some kind of bug which sometimes makes diggers stop before they can carve the entire level. In that case room creation process is filling empty wall spaces. This happens:
The level works, but those rooms are quite large and the actual maze is pretty weak. I think the problem is in how long diggers walk in one direction before changing the direction and cloning itself. There should be more copies. Also rooms could be restricted to a smaller size. Maybe also fix that double wall room creation.