A job well done!
You are gifted with the power of great storytelling i'm telling you ;) The way you create a mood and world around your words and music is just superb. Nice for you to have done all the work yourself, music included, it just flowed seamlessly in your art. Also the (hard and time-consuming) frame by frame animation really stood out, and made the characters look more alive then if they'd be symbol animated. As for the story itself, it really got me curious about the sequel. But next to all the splendor of this animation, there were a few small points that could use a little improvement:
// music
try to isolate your recordings a bit more, there was a vast amount of voices and enviromentnoise in the background.
// animation
the point where you try to cut the foreground and the background trees loose with layers, you could have created a bit more layering in the animation, for it was a bit obvious that it where 2 pictures sliding among eachother.
As for the actionscenes: when you try to do quick motion with lower framerates, you could consider using some cut-techniques like changing camera-angles and flashes instead of viewing the complete action frame by frame. It could save some precious time for you aswell keeping the speed in the animation ;)
That's all that could use some improvement I guess, I'm really looking forward to see the next animation coming from you. You have some real potential, keep this series up, it aught to be a succes!