This is certainly very unique. I can see it working as a forest theme for a game, so I guess you managed to capture the feeling of "autumn" fairly well.
I actually had to hear this 4 times to figure out what kind of criticism I could offer. It's beyond my level of production, and I could definitely learn a few things about mixing from it, hopefully. The only thing I can say is that the pads and strings can be slightly overwhelming in some parts, and not all transitions flow completely smoothly in the beginning. Other than that, it's great.