I just finished the game after 4 hours of gameplay (98% completed, missed a tip) and it tels that there are 5 other endings ... I think I had enough, though it was a very good game (5/5).
I played this game on Armor Games before it was brought here site and it never occurred to me to throw the plane backwards ... but after reading the comments I still did :))
 "Catburger factory"){kind=icon}
 "Virtua Pong Redux"){kind=icon}
 "Clarence's Big Chance"){kind=icon}
 "Alxemy"){kind=icon}
 "Flight"){kind=icon}
 "Debugger"){kind=icon}
 "Path of Honor: Chapter 1"){kind=icon}
 "Fragger The Lost City"){kind=icon}
 "Bear in the dungeon"){kind=icon}
 "Heavy Weapons"){kind=icon}