Well, by gosh, I'm sure this is a first for the forums -- a song designed for sweating!
Regardless (and though I confess I perspired little whilst listening), you've done a fine job of evoking a restful, contemplative atmosphere with this elegantly simple piece, Sagreene.
The unexpected breakaway into fuller instrumentation ~2:30 was a pleasant surprise, and the surreal atmosphere of the midsection of the piece is highly effective. The subtle (and not so subtle!) use of percussion in this part of the piece was also particularly well done.
I liked the broad stroke of an ABA rondo for the form, too. The symmetry of it seemed most suited to the intentions of the piece.