in my opinion there are some parts which aren't done good:

if you roll the airplane i have the feeling that suddendly the wings disappear.

the tubes are passable i think this is a little bit strange and should be corrected. Is this the missing level designer?

it seems to me that the airplane moves very slow forward and sometimes it moves faster as you steared up or down or to the side
A question to this:
How do you do the movement?
are you simply using c_move with from hand fitted (von hand angepasste ) parameters, the Engine physic or another one or do you have programmed your own?

and the last thing a minor thing:
the propeller doesn't turn

besides this and the not good done leveldesign(i know you are searching a level designer -so this shouldn't be a part of critism - and i'm bad too in this point) seems the rest done well.

hope everyone can understand my post

muffel