Destroy any airborn targets with your GUNS instead of missiles and you will get double the money bonus at the end.
Beat any 2 levels without returning to the air base in a row to get more planes
Always target the yellow section of a battleship, carrier, or any other type of target. Forget the turrets, as they explode once the yellow section is hit by your missiles or machine guns. You do not have time or missiles to try to get each target for more points.
Use the F-14, F15C, F-18, F-22, BlackWidow, Funeral (end).
In order to catch up to the red planes on the map (before you take flight), you must select the best plane with range. The higher the range, the faster you catch them. This is the only way to catch these red planes (Bombers or Spy). Otherwise, you will fly in circles trying to catch them.