I love how you draw colors! The page has a beautiful color scheme, and none of your shadows or highlights are devoid of a bright pop! It works really well with your line layer too, since none of the colors are extremely dark, letting the thin, clean lines do their magic.
Your lines are so very good! I rarely stray from just using black on the line layer, yet your lines are smooth (especially with the end of the bangs, that really brings out the texture in the hair) and crisp, with each different base color having it's own lining color!
The way you draw light, both the source and how it reflects, is stellar. Like the glowing water? Casting a blue tint everywhere? Amazing. And you didn't let cold shades be the only hues on the cover either -- the way you let the blue interact with the warmer colors on the jacket and skin is probably my favorite part!