I was cleaning my code to make sure that all functions added their specialty sprites using the same code so that only one function was needed to clean up (delete sprites, along with any joints). And I removed the specialty sprite functions for doing the cleaning up.
Apparently I missed setting one type of specialty sprite for deletion. See if you can figure out what the specialty sprite does. (I left physics debug on to see some detail behind the display.)
This gives you a couple more hints about the game.
Oh, and if you use the upload/copy view link/edit to post an image in a post, don't edit and click 'Click here' to delete the currently attached file.
Cheers,
Ancient Lady