This is the first time that I do work using Unity. It's a really new and fresh experience, and I learned a lot during the editing. The most challenging part was the 3D sound. I was going to make listeners able to hear the sound of river when they come close to the boat, and they cannot hear outside the mountains. Finally I did it by chance but I was still not sure what exactly I did. Also, the video exported has a really loud footstep sound. The footstep even cover some of the sound of river, however, I really have no idea how to adjust the audio.