I built this to practice programming in Factor, and later contributed it to Factor extras so that it may serve as sample code to the factor community. You can Browse the code in the Online Factor Vocabulary Browser.
Art used from Code Project: http://www.codeproject.com/Articles/420088/Snake-game-for-tablets-and-Smartphones
Art credits: Erich Duda, BSD license: http://opensource.org/licenses/bsd-license.php