when i was 10 i clocked the gae 4 times without dieing, then i turned it of cuz my friends got bored watching me play. i only ever used the atari joystick. , man i loved that game. i still own the originaal atari 2600 console and all my games. i also clocked pacman, and frogger. (ie clocked = getting a score over what the game displays. ) i remember the space invader game showed wierd symbols after each clock.