If you have played and enjoyed All Things Devours and perhaps wish that there was a little more of it, then you may want to try the challenge mode. It is activated simply by typing 'challenge' as the first command of the game (and must be so activated each time you play). The challenge features three changes to the game which combine to make your task more difficult. Whereas All Things Devours typically has many different types of solution, the challenge constricts your options and it is most likely that you will need to develop several new approaches.

Given the nature of the challenge, no hints are provided. If you do become truly discouraged (and I hope it is not so) then here is a walkthrough. It might also be interesting to compare it with your own solution.