Your mission in this cool shooting game is to take command of an orbital defense platform stationed in a region of space called the omega sector and save the human civilization from a threat of attack from alien beings. Use WASD or ARROW KEYS to navigate/scroll the screen. Press the SPACEBAR to change mode (attack/manage). In attack mode use YOUR MOUSE to navigate your ship and click LEFT MOUSE BUTTON to shoot main cannon. Use 1-4 NUMBER KEYS to select/focus your warship. Press ESC to return focus to main cannon. In manage mode use LEFT CLICK to build/upgrade tower and press ESC to close build/upgrade menu. Good luck soldier!