I made thing program as a school project in my special topics class on J2ME (Java 2 Mobile Edition) during the summer of 2006. You'll note that this is the year before the iPhone came out.
Jotto is a classic word game where you try to guess the randomly generated secret word. It keeps track of how well you're doing with high scores, both for least amount of time and least number of guesses.
It's available on all J2ME (Java 2 Mobile Edition) compliant mobile phones with screen sizes 176 x 176 or greater and standard phone buttons... which is pretty much none of them anymore.