Zarzon

Fly your spaceship to Saturn, then once on Saturn destroy as many Satan's as possible. Additional bonus points can be accumlated by destroying the comet or attacking dragonflies. An additional spaceship is rewarded if the players score reaches 5,000 or 10,000 points. If the attacking UFO's or enemy rockets are destroyed points will be scored. The game progresses through 4 different screens.
The game has a 1up and 2up player score and High Score tallied at the top of the screen.
The arcade cabinet has one joystick to move the spaceship left to right and guide the missiles.

Source: Wikipedia, "Zarzon", available under the CC-BY-SA License.