Riku Cover: Between Light And Dark

Though originally hand drawn by at [link] , this cover is my best work yet! I worked harder on it than I usually do since it's freaking RIKU!!!!! He's my second favourite Kingdom Hearts character after Sora, of course
The lineart was done in Paint Tool Sai
The majority of the colouring was done in Adobe Photoshop, though the boots were done in Sai also.
The background was created by me (though I was following a guide)

Anyway, I'd like a little feedback on the colouring technique and shading. I was trying something new here and I'd like your opinions....
And yes I finally finished it! After weeks of saying I'll get it done this weekend I have finally finished it -_-