The Little Yellow Sub Has Met It's Match. Face several kinds of enemies and bosses and Try to get the highest score like the games of yesteryear. Features Paralax Scrolling Backgrounds, Music and Sound, and over a dozen levels of fun. Automatically configures to different devices. Works On Any Palm Os 3 or Higher Update! 11-12-2003: New Highscore Save Feature And New Keymap Ability. Use any keys on any device! Even Sony's new UX Series! Want to use the arrow keys and the space bar? Go ahead!