Very well done
I must say though, this differs far from my ambient song (By witch I mean yours is better) you have a lot of varity, while I tend to just use the same repetitive percussion loop on top of a boring medlody and some odd sounds, I should learn from this and other experinced ambient artists, though I've only made one ambient song, so I'm still learning.
Sorry, didn't mean to go on about myself there, this is supposed to be a review, ha, well all I can say is, a jorb well done. (Yes, I made a homestar runner reference.)