I really had no idea what was going on in this cartoon, but it was still great to watch! I had no idea there were so many of these NATA things that people were still working on. I don't even know what that stands for. It's weird, because you claim this is THE final entry, but there's only two in the collection. I guess this one didn't do as well as the first. I am of course digressing and should go back to how cool this is.
The colors were fantastic and it was great to watch. I couldn't help but think you were trying to put some spiritual twist on this. Was the train supposed to represent how we're losing our focus on our goals? I guess not, but it's still very interesting. No dialogue makes it so that it tells the story on its own.