I noticed playing the game the soundtrack uses "layers" that fade in and out depending of the action you are doing and the zone of the island you are. How many "layers" do the soundtrack has? What considerations did you made when organizing the soundtrack? 
I loved it and I enjoyed the game so much. Thank you for developing it <3 

I loved the soundtrack so much I bought it. There's about a dozen tracks in that from the game itself (plus extras). Check the game's main info page for a link to buy the soundtrack.