What is your favorite online puzzle game and can you please post a link?

My favorite genre of online games is puzzles. I don’t do action, nor shooting and few sports. Mainly my wrists cannot take so much constant action and I would rather play an untimed game and if you can come up with a very nice and fun puzzle game online to play I would be very happy. I do have an account with Kado http://www.kadokado.com/ and my user name there is Kevisaurus. I like the 4 games a day max and how you get to advance, etc… I love puzzle games and if you could suggest a new one I would be very happy to see it.