Hello, Ola!
I see you've finally made it to Newgrounds; took you long enough. ;p
What can I say that I haven't said already on your forum? Your skills in creating landscapes of all types are incredible, as is your structuring the movie to the music so perfectly, but the character designs are more mixed. Whereas the creatures in the woods, the horse and the dog are very well done, Nim himself doesn't look so polished (and I'm sorry, but he reminds me uncomfortably of Caillou when he has his hat off); the placement of the mouth, nose and eyes is just not very realistic and out of character with the rest of the flash. There's also the problem of scale (giant vs. Nim) and how during the beautiful sunrise at the end of the flash the sky doesn't actually turn blue.
All of these things certainly don't stop this flash from being my favourite on Newgrounds!
P.S. You may want to add a warning at the beginning of your introduction that this flash isn't for people with short attention spans (I have a feeling that Gooberstory's ratings will suffer eventually because of this).
Take care!