I just love how you mix simplicity with details, there's a great balance of each one! I think the only thing I would change is the hue of the sky under the clouds, because it looks a little too similar to the green of the grassy hills and it makes it look like an extensive grass field instead of sky! The contrast of white in the creature and the flowers against the dark background is perfect, and even though they're the same color the flowers don't steal the spotlight away from the creature. Awesome work!
I think that you did a great job with the background! Especially love the grass and the little flowers; they've got a nice, stylized look to them. |3