You almost had it.
Yes, it was a bit too repetitive, and the only shift happened a little too late in it, but it was nice ambience. Something to just chill with, really.
Though, I would have appreciated more of the extra sounds that you had in there for just a few seconds. Break up the repetition, you know?
Just too out there for me. Way too much echo for my taste. You also don't seem to know what you want, Organic sounding synthesis or, very artificial sounding synthesis. Your melodies are created for more organic sounds. Don't just shoot yourself in the foot. If you put more work into this, it'll sound just fine.
Please contact me if you would like to use this in a project. We can discuss the details.