Maaaaaaaaan i don't get how you guys can get out that easily...
It took me some time to get in, but then, i couldn't find a way out...
I believe i tried 40+ times without success from Medium down to Vry Easy... in the end i skipped it to see the outro.
Later when i decided to finish the campaign in Insane, i was once more on it, and i finally understood my mistake.
When you enter the main reactor room, it requires you turning around in the tubes before, and taking a last turn out of it to enter the room.
This makes your fighter pitch around, and completely faked my perception of the ship D:....
When i finally understood that you'd get out from a tube downwards, i could get out in around 5-10 tries

IIRC, Spoon told me the first marker to get out appears when you destroy the 2 side reactors....