First time coloring

This is a demo of coloring other people's work, it's the first time i do this kind of stuff, the linework was given to me by the great artist , i am not completely sure who did it but it is NOT my linework, i just did the color work. hope they like my job.
As it is my first time in coloring i'll be glad to hear your comments.
Sorry about the watermark but it's not completely my artwork