Try to collect all of power ups and special weapons that appears in your way. Use ARROW KEYS to control your space craft, and press "A" KEY to fire. Kill as many enemy units as possible to refill the special gauge at the bottom right. Once filled, you may press "E" or "R" KEY to utilize a powerful special attack or press "F" KEY to repair your shield to prolong your life.
In this side scrolling space shooter, destroy all rebel machines.
GameCanvas is a Canvas with additional capabilities; it provides methods for immediate painting and for examining the state of the device keys. These new methods make it possible to enclose all of a game's functionality in a single loop, under control of a single thread. To see why this is attractive, think about how you would implement a typical game using Canvas: