• On Stages 27, 20, 15, 08, and 04, a V-formation of red planes will come straight down from the top. If all five of the planes are destroyed, a Black/Red POW appears, giving the player an extra airplane when picked up.

• On stages with the wingman power-ups, use them to kill off the large bombers easily by crashing a wingman into them. You will get a second chance to get them back later on.

• On the stages with the boss planes, save all your loops; shoot at it quickly, loop down to avoid the shots, shoot at it again and THEN loop. You should be able to kill it this way.

• Most of the time it is easier to keep only one wingman rather than both; that way it's easier to maneuver around enemies. If you miss the red airplanes that give you the wingman powerup, kill off your plane (assuming you have some remaining) and the game will place you back before them.

• An interesting bug : If you win an extra plane from points when killing a boss plane, no extra planes will be awarded on the basis of points. Extra planes can still be obtained by getting the Black/Red POW, but no point-based bonuses will be awarded for the rest of the game.

• The end of stage bonus for 100% shooting down is actually 50,000 points, even though the game displays a 'special' bonus of only 10,000 points.

When the player loses all of his ships, the game offers to continue for another credit. If this option is chosen, the game continues where it left off but the score is reset to zero.

• There are six kinds of powerups : Quad fire, destroy all enemies on screen, two wingmen, make enemies stop shooting temporarily, extra loop, and extra life. Note that the destroy all enemies powerup does not destroy the small slow plane that has the 5,000 bonus item pickup.

Quad fire power-ups are found on Stages 32, 28, 24, 20, 16, 12, 08, and 04.
Destroy all enemies power-ups are found on Stages 31, 21, 19, 18, 11, 07, 03, and 01.
Wingman power-ups are found on Stages 30, 26, 22, 18, 14, 10, 06, and 02.
Extra life power-ups are found on Stages 27, 20, 15, 08, and 04.
Stop shooting power-ups are found on Stages 27 and 15.
Extra loop power-ups are found on Stages 23, 18, 17, 13, 09, and 05.

• % and point up Stages are 29, 25, 21, 17, 13, 09, 05, 01. During these stages none of the enemies fire on the player except the large bomber planes.

• If the player earns enough bonus planes so that ten ships or more are in the reserve, the ten remaining ships indicators are replaced by the Greek letter Sigma (?).