I think I mentioned that I've added a couple of new items -- the "wall slip" and the laser that Robo-Ninja can shoot out of his eye-holes. I thought that might give me a fun programming break from designing maps. But fortunately, it turns out that I actually designed properly for these things, so they were really easy to add. The wall slip, in particular, only took about 15 minutes, by reusing what I had from the wall cling. The laser took a little while longer -- not because the laser itself was difficult, but I had to add functionality to the enemies that lets them die when hit. Either way, it was all straightforward based on the code design.
So back to editing maps. Robo-Ninja's world is starting to grow out a bit, although there's still a good way to go. I think it's time to stop for awhile, so I don't get burned out and starting making stupid levels, and instead start writing the code for the opening story sequence. That will be interesting to write.