I wouldn't exactly call this a vexel, lol. Looks more like it was mainly painted and smudged with a brush, with some line vectoring by the Pen Tool.
You did a pretty good job on coloring this although I would definitely suggest using Shape Layers for outlining things instead of Paths since Paths have those ugly blunt edges that don't look good on living things like humans (especially on hair whose edges are supposed to be pointy and thin not blunt like this). It takes a bit longer since you have to outline the lines on both sides but the result are way better.
Oh, and please don't tag your submissions with the title of the wallpaper and your username - only valid, anime series, characters and theme tags should be added. ^^
Keep it up!