The problems of puzzles are very near the problems of life.
Now, after the Cube, I still don't have any plans to make anything like it.
In my teaching, I enjoyed creating models to clearly communicate my thoughts.
Once I completed the Cube and demonstrated it to my students, I realized it was nearly impossible to put down.
A good puzzle, it's a fair thing. Nobody is lying. It's very clear, and the problem depends just on you.
If you are curious, you'll find the puzzles around you. If you are determined, you will solve them.