You've got kinda weird lines in some places - they could be cleaned up in particular on the blond girl's hair and the hair for the guy with an afro. I think your shading could be improved, too (the shading on the afro guy's hair is really flat, for example). That said, you've got a pretty cool style. Keep working at it!
thanks for your feedback.
i'm not quite sure what you mean by 'weird lines' - could you be more specific?
i feel like it's worth mentioning that this peice is meant to be viewed at 2x (which is the scale it will be in the game). i probably should put that in the explanation somewhere...