This is gorgeously ambient. Loving the hints of vibrato and wavering pitch of those lead triangle/square leads - really sells the listener on the space setting. Contrasting those patches with some strumming is a great way of mixing organic and electronic elements together, symbolizing the falling from space back to Earth in a way. Nice use of a reverb blow-out here as well at the half-way point to signal the return to Earth.
Bird samples do a great job of keeping the listener clued in to what is happening, but I have to give props to the piano playing here; gorgeous melodies on top weaving around one another, subtle chords down below making excellent use of dynamics and articulation to provide a gentle pulse to the piece. Having the orchestration come in to support the piece felt like an enormous relief of the tension accumulated while coming back home. Some really nice motion on the strings, and the mixing does a solid job of really using up the stereo-field.
This is some great work. You've really captured the feeling of floating-turned-falling with this. I can envision a character drifting down, twirling in the air and happy to be headed home. The accompaniment does a fantastic job of bolstering this image and fits it to perfection.