Then next step for you, of course, is to make a 5-dimensional Sudoku puzzle.

<alarmed gleep>

I don't even make 2D ones - I just solve them and translate them into incomprehensible English.

(An earlier, even more unsuccessful effort was to replace all of the numbers with words for someone who liked puzzles but was alarmed at all of the numbers. Never heard back. Of course, I think it was much harder that way. I suspect it was for the victim, too, despite his numerophobia.)