Instead of supporting only "boring looking" traditional "Karel-the-robot" worlds,
One can create logically-equivalent, but much more interessting looking puzzles:
It even support supports the creation of Sokoban-type puzzles:
Pushable boxes, can become bridges enabling crossing water obstacles
If you want to find out more, you should have a look at the new documentation, in particular the advanced features section. I still have a bit of work to do on the documentation, but it is already fairly comprehensive.
Check it out and feel free to share any world/puzzle/task you create! :-)