I really like the low saturation of the pallete used here, as well as the loose brush work in grass. It's... almost impressionistic; playing easily with the stage's strong, but not forceful use of light. All of which blends invisibly with the decided lineart of the characters themselves.
The levels of the piece are separated nicely too. You get a feel of where everything is, in itself and in relation to each other. In short, it's lovely