Very good stuff. I was riveted and immediately replayed. The art and animation are excelant- I was stunned by the vision of the light through the branches and thought for a moment it was real.
As for what is going on, I have no idea and I suspect that maybe you don't either!
For a while, I could not see where the BAD bit came in, then it became very grim. I suppose I just interpret it as a sequence of dreams, which may or may not have any meaning to her.
My definition of a good story writing includes the idea of making the reader/viewer care and I found that I did. I wanted to hug her and make it all right for her- and stroke the green foxy thing. The sound/music choice is also spot on.
Nothing I would change.