I really like the colors you chose and how you kept the sketch parts un-colored really make the colors you picked to pop. I love the detail in both digital and traditional parts. The only thing I would work on is your background, while the solid white works with the colored parts of the image, the white and the colored part seem to over take the sketched parts of the image. Next time consider testing out some kind of back ground, even if it is just a different solid color.