【實用教育app】DynaPlus for iPhone|最夯免費app-綠色工廠好玩App

DynaPlus provides a fun way for you to practice the addition of signed numbers while navigating your space ship to shoot down space aliens attacking from the planet Arithme. Your ship's sensors detect the approaching enemy ships and you must correct your course to match theirs. Be sure to shoot the enemy ship before it enters the Red Zone -- or it will blow up your ship. There are five levels of play. In Level 1, your sensors detect enemy ships that are within + or - 5 units of your position. As you progress, your sensors improve and can detect enemies that are further away. * Game Center support for Leader Boards and Achievements * Special power ups to up your score and earn extra ships * Five levels of play * Start new game at any unlocked level * Earn more points for shooting from greater distances