I had some spare time today, so I've added a hint system to the game for those who are getting stuck; I've had mentions from a few people, not only comments here on itch.io. Just like most authors, I didn't think that my puzzles were that hard, but of course I already know the solutions! :)
Type HINT at the prompt to get your first hint, and also some instructions on how to use the hint system. The hints are revealed one stage at a time, as you ask for them, and still don't ever give the out-and-out solution (but they do come pretty close to it).