Visually, it's a kung-fu movie, you will see kicks, you will see flips, you will see punches. The fights take place in visually distinct areas that provide their own unique feels and challenges, it's very video game like in that sense. If you want to see grown men get their asses handed to them by a young girl, you will like what you see.
The music was very adequate, none of the pieces strike me as memorable but that may have been because I kept shouting "Holy shit!" when someone did something impressive, which is most of the time.
Overall, good watch. There was one point where I had to pause the action and take a break, just because my suspense of disbelief had been shredded to pieces completely. I don't want to spoil what this event was, but I will say it's pretty minor and the film picks up again once it's over. Basically anytime the movie isn't focusing on Zen fighting a room full of people you're going to be suffering and waiting for the action to start again. Aside from Zen and Moom, nobody really feels human or relate-able, they're all just there for the illusion of story. I should probably mention Moom, he's the chubby sidekick friend who tries to help but doesn't really do much. I feel like there's so much more I want to say about this movie, but I don't want to just describe particularly awesome kicks or flips or flip-kicks for an hour. At least not unless I can do so using my mouth to make crashing noises. Chocolate isn't a movie that's big on plot, but who needs plot when you've got action sequences this good?