Fast movement:

Press [Ctrl] + S during game play. Then, press [Keypad 2], [Keypad 4],
[Keypad 6], or [Keypad 8], to move in the desired direction.

Instant kill:

Press [Ctrl] + X to instantly down an enemy fighter. Note: The kill
will not count towards the score.

Retain character:

Quickly press [Esc] after your plane has been shot down or has crashed.
Select the "End Mission" option. Your pilot will still be alive at the
current score and rank, but without the points for the last mission.
Note: This will not work if your pilot is killed by a direct bullet
hit.