Great work Peter.
You should name yourelf Peter Pan cuz ..thisd is some real magic. =)
Only minor thing, but for me I don't know if anyone else has problem with it, some textures of clouds are too big and that makes me wonder about performance. Plus they take much more of my, day by day, smaller and smaller hd. =)
But I do resize for myself with Paint.net, save them in DX5 format, that saves a lot of space and... they still look very same. Perfect I mean. ;)
My eye can't see the difference with ~50% smaller textures.
Keep up.