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Defend the 10 planets from the invading vectors with your base gun. Author Comments: Thanks for the feedback, I've made the game a little easier and you now get power ups when you shoot the satellites. PLEASE let me know of any bugs you find! Defend the 10 planets from the invading vectors with your base gun. You WILL unlock planets as you successfully defend each one. Use the mouse to aim, click and hold the mouse button to build power, then release to fire. Red blockers on later levels cannot be destroyed Destroy passing satelites that fly across the screen to gain new weapons. Rebound your bullets of multiple enemies for greater scores.