Straw Hat Assassins - Usopp [Request]

This request drawing was made by . It is of One Piece character Usopp, dressed as Assassin's Creed 4's Adewale. Originally this was supposed to be part of a suggested series of drawings, wherein each member of the Straw Hat pirate crew is dressed in the Assassin garbs of the Assassin's Creed series line-up of characters. For fairness sake at the time I had to settle for one character, but I must say the challange was quite fun, so hopefully down the line I can do a complete set.
I decided for this drawing to match the style in the manga, which was a bit difficult since I wasn't really familiar with the series and I couldn't quite find a particular point in the Manga to draw inspiration from. Nevertheless I wished to do my best on this idea, starting with choosing which parts to color in completely in the black and where to put in the details. It took some trial and error to find the right pen settings to match the micron used for the art, but in the end I felt that I got it close.
Tell me what you guys think. If you're a fan of the manga, what are your thoughts on my attempts at the style? Was there something I did too much on? Not enough? Please leave any and all criticisms at the bottom.

Cheers.