Nice work on the vector, it's very clean. Nice use of brushes I might say and i really like the colors. You should loose some tech brushes though, the ones in the right upper corner.

The vector isn't bad at all.
but, the hair could use some work. a few lines to divide it up internally.
the random brush thing works in some places, and looks awful in others. the puzzle pieces should go. it totally doesn't fit the rest of the theme you have going with clocks and such.
they look more like you were trying to fill up space
you could also use some level adjustment in the clouds on the left. give it darker darks for some serious contrast and depth.
overall, nice work. just could use a little tweaking.