Landing upside down: Upside down landings are allowed on level 6. Pressing
Option 2 + Left or Right to perform a barrel-roll.
Keep the plane upside-down and press Up while over an airstrip
to land. After landing, the cockpit will open from the fuel tank
and you may take off again by flying backwards.
Bonus points: Activate the afterburners as you enter the canyons
on level 4 to receive a "Gutsy" bonus of 30,000 points.
Activate the afterburners again immediately before entering the
second set of canyons to receive a "Lunatic" bonus of
65,000 points. The bonus points are added to your score after
landing.
