Fully upgrade everything, fly at an angle of 3% (upwards, obviously..).. boost up to 200mph, reboost to 200mph as soon 175mph is reached, repeat until fuel is all gone, let it glide.. done :)' this works!
Over a thousand kills and the "Red Guy" dead but wouldn't proceed. A two year bug??? Not a bad game if the programmer didn't suck so bad as to just leave the game screwed up