Nice, it's spoiling time.
Well, start off, I was unclear if it's possible to get the bomb on the first level (and still be able to leave).
In the first level, when you are falling, you must go on the right to leave the level.
But if, with your parachute, you fall on the left, you must use the bomb to destroy one or to blocks of the wall to leave the level.
Then on Descent02 both locked doors have solid stone behind them, so I can't figure out how exit.
Oh ? They are only here to decorate. The true exit is at the top right hand corner. Sorry. ^^
But I got as far as 08, and then there's something about a helicopter and I really have no idea what's going on.
The exit is in the sky, at the top left hand corner. You can see the exit when you are on the top of the palm, all on the left.
I hope to be understandable.