Saw on the Kalon FC that you were looking for some feedback and thought I'd offer some to you? (Plus at least here it's easier to find than dig through posts). Now I'm not a great designer myself compared to some others, but I do have some helpful tips.
I think the concept you have was really cool as I like that movie quite a lot.
Now mostly from what I can see (due to pixels being not filled in/discolored) that you used the fill bucket tool which I'd say just ignore it like it never existed as it might be quick, but it leaves things looking sloppy in a sense as not everything is filled properly + it's actually leads to having white/grey pixels from the black line-art pop out a lot.
-Try the blending tool (it''ll help add to the design and make things seem whole and not pieces pushed together)
-More body/life to the hair like waves, strands, less jagged edges and do round, flowing edges for that hairstyle
-Add details (don't just stick to a solid color on solid color
Not best tips, but I hope they help a little and just keep trying you'll get better (I still think it's pretty good, I still have a hard time with hair and roses are impossible for me to draw)