Take a look at the new tab "Jigsaw Puzzles" above. I transferred the online Circle C puzzles from the website to over here. I'm redoing the website and tightening it up, but I didn't want to delete the puzzles altogether!
Enjoy! By the way, they work just fine on my computer. If they don't work for you, check your device and make sure you have the right program to run the puzzle. I think you need Java. It's free.