Hints:
Get More Planes: Beat any 2 levels in a row without returning to the air base to get more planes.
Double Money: Destroy any air targets with your guns instead of missiles and you will get double the money bonus at the end of the level.
Hints:
Get More Planes: Beat any 2 levels in a row without returning to the air base to get more planes.
Double Money: Destroy any air targets with your guns instead of missiles and you will get double the money bonus at the end of the level.