A big update to the level editor: you can now use your own graphics to create the levels!  You are no longer limited to the built-in graphics.  Just select the new Generic element, choose any .png file, and place it where you want.  Add as many as want!  The latest version also comes with 3 example levels, and quite a few example graphics ready for you to use.  As they say, the only limit is your imagination!  As well as your artistic skills and creativity of course.