The objective is to shoot down the words before they hit the city.
Students can turn on and off the audio feedback to hear the correct pronunciation.
Sound effect can be turned on if students desire more game-like atmosphere. A game can temporarily be suspended to check the pronunciation of the words students may have forgotten. Sets for other major textbooks are under consideration. The hardware platform is currently limited to Macintosh. Macintosh computer running System 8.0 or later.