The object of the game is to fire at the aliens in a way that the color (polarity) of the aliens match the target color (polarity).
You begin a new game by hitting the "START" button in the main menu. You can select a skill level with the + and - buttons.
To get the proper target color, you shoot the antennas of each of the alien's ships with the missilles. You have 2 kinds of missilles the red (positive polarity) and the green (negative polarity).
Use the mouse (or optionnaly the joystick) to select your target. Simply click the left (for positive polarity) or right (for negative polarity) button. Your ship will then fire a positive or a negative discharge directly on the targetted antenna.
As the level goes up, the aliens merge in bigger electrical complex.
On higher level, the player is force to use all combinations this requires a better knowledge of the logic gate effects.