Sounds good, perhaps heavier effects (chorus or something like that) on the voice on some passages would have made it better? The voice in itself is great, but I believe that on some parts a sort of almost ghostly, doubled/chorused/warmed/whatever'd ( ) effect (like that you can hear on Jeff Buckley's voice on Nightmare by the Sea as far as I remember) would have brought something to the atmosphere of the song, in my opinion.
Quote: I’ve been flying
All around the shiny fields.
Quote: Fly from flower to flower
And feel the power of the wind
On these two passages I think you could put more emphasis on the effect that you've used (whatever it was it sounds good, just maybe not set deep enough).
On this passage:
Quote: But now I’m free,
And I feel so strong,
Delicate and majestic,
I hit the sun with my powdered wings all day long !
Increase the sort of chorus effect on each sentence, so as to give the impression that you sort of add one more voice to a choir at every sentence (not sure if I'm clear enough about what I mean, so go and listen to Queen's Bohemian Rhapsody and I think that'll convey what I have in mind more than I ever could at such a late hour).
Don't have time to check the rest of the song right now, I'll edit later if I thing of something else.
Effects can be tough - sometimes it's better to err on the side of caution than to take them too far. it sounds like you're getting to where you want it though.