It looked so interesting: a Sudoku on my page with all kinds of levels. This would attract visitors to my site.
What it does, is: make an iframe that shows the Sudoku from the MyPuzzle website on my page. At the backend I cannot do anything to edit or control the content of the puzzles. They are directly loaded from the mypuzzles website and both on my website ánd on the print page there is a link to the website of MyPuzzle.
It looks more like a cheap way to promote their own website. If you don't mind that, then it will work. To me it doesn't seem a true Joomla module.