Cute image, I like the foreground a lot.
The castle in the background looks like a toy though, try to give it the same atmospheric perspective effect as the trees. Actually give it even more due to the scale. This is discussed in the second perspective class, which I know is rather far ahead of this class, but it will show you what I mean.
You could also pull the castle upwards and have it floating up on a cloud like a dream image, but again the atmospheric perspective will be important.