Very cool song! Very peaceful, really sets the mood and my respect for the flute melody. I think it would fit perfectly for films and it reminds me of beautiful nature. I don’t have much to criticize about the choice of instruments or the arrangements. You can hear that it all fits together and that has been chosen with the right intensions. However, I can mention some things about the final mix.
I listened to this track while looking at the spectrum analyzer. A device where I can see all the frequencies of the track. I noticed that the most activity is above 400-500 Hz. This is the mid / high section and for instance, the flute is playing above that frequency. In my opinion the track needs a little boost in the low frequencies (below 400Hz). The track will get more balanced and and a warmer sound. Don’t overdo it though, you don’t want that your track becomes blurry :)
At last I would say: Go play around a little bit more with your reverb. I can hear the reverb on the instruments, but the reverberation stays around in the middle of your stereo image. Maybe you can try to expand the width of your reverb vst/plugin/device. The sound will get a lot bigger and even more magical. Tip: If you work with auxiliary channels, use two channels for one reverb. Put the same reverb plugin on both channels and pan them all the way left en right. This way you can decide precisely which instruments gets reverb in your stereo image.
Besides that I am a little bit of a nitpicker about mixing, you have talent man. Keep on writing and recording. :)