Nice spacious sound, beautiful timbres, very relaxing melody.
The intro seems a little soft for what comes after; I turned my volume up right at the start, then immediately discovered that the main melody line is mixed quite a bit higher than the intro bass.
There is a bass part of some kind that comes in repeatedly, first at ~0:35, then again immediately at 0:51, that seems to be slamming the meters on its own track, or maybe really highly compressed.
This gives it a sound that to my ears doesn't match the very smooth, cool, beautiful sound of all the rest of the mix. It sounds like a timbre that belongs in a different style of music.
Increasing the attack time on the compressor quite a bit would keep your bass levels up, without over-emphasizing the snap of the attack portion of the envelope.
The repeated-episodic form of the music, simple as it is, is a nice change from the usual instrumental pieces which follow song form--just different enough to catch my attention, not so different that it's strange.