I'll colour, if someone else lines :)

tip for the future... when shading, the burn tool is generally not a good option. It makes the colours boring and dull. try to pick your own shadow colours out. Sometimes, it's good to add a little of the opposite colour of your light source to your shadow colour... if the light source is yellowy, add a little purple, if it's bluish, add a little orange, etc. Try to use the burn tool only to darken the very darkest shadows even more. Hope that makes sense :P You've got a good start, keep drawing :]