In case you're hankering to play another game on your Kindle, Amazon has released a third free title, Mine Sweeper. Previously, Amazon had a Minesweeper game built into its e-readers as an Easter egg, but this version is more flushed out.
Helen, who posted a user review, says, "This is SOOO much better than Kindle's built-in Mine Sweeper game (which you can access by pressing ALT+Shift+M)! The graphics are really good on an e-ink screen. Unlike the Kindle's built-in Mine Sweeper, this version keeps track of your high-scores as well as your play-time. You can choose between easy, normal, and hard mode."
Amazon offers Shuffled Row and Every Word as free games and Scrabble as a $4.99 download.