Helpful Hint 1:
Levels 1 - 11
Missiles can be easily avoided if you bank to the right or the left
as they approach.  You can do this as early as you like. Not a single 
missile can hit you, they will fly beneath you as
you can see in the picture below.
Click HERE to see the Video
Stage 3 is a refueling level.
Simply press UP and buttons
1 & 2 to dock when the
plane approaches.
Stage 6 is a boss level.  Shoot
the lower 3 missile hatches to
beat it.  All bosses are
defeated the same way.
After beating the boss, you will land, refuel and take off again.
Helpful Hint 2:
The missile dodging trick from here on out no longer works.  The best
defense now is to stay at the bottom of the screen or the top of the screen.
As the missiles approach you, move to the extreme top or bottom depending
on where you are.
Click HERE to see the Video
The End