Most of the visible changes with this release are to the level editor. The editor can now add and delete levels from a level set, and set the level names and hints. Also the editor now does all the wall rounding automatically. Plus there are major improvements to the user interface: the dialogs have improved, and the editor does not let you exit without saving. The user interface improvements and cleanups extend to the game itself too, but are mostly behind the scenes there. See the python Kye page.
While testing the editor, I have created another set of levels. I have added SYSTEM.kye to my Kye levels page. Enjoy!