that.. shade of orange in the sky doesnt mesh well with the purple because its so dark--so some more yellows would be
very welcome, esp on the bottom. the grass... that shade of green seems wrong for the atmosphere.
the wall lines are a bit too straight, so whenever vectoring something geometric you should always rough up the lines a
bit.
my biggest complaint though are her eyes, i feel they are far too up on her forehead. i think its because the top of her
head is shorter in your version than the scan.
and then theres lighting--just add some gradients here and there (near the top of the walls, near the bottom of the sky,
circular around her face etc) and blend to give this wall some more depth since as it is now the colors look a bit too
dark.
i really do appreciate the technique and level of detail on the painting and vectoring though, esp for the balloons and
the stones in the wall. with some slight changes in lighting, all that hard work would really shine through :D