This is pretty good. It's got an original setting for an S&S fantasy, akin to the docks of late 19th Century London, and adequate action for a story of its genre and length. The characters, while the story doesn't really last long enough to color them fully, appear evocative and appealing. I found no low-level mechanical errors, and you might be surprised how many Smashwords writers have command of neither grammar, nor spelling, nor punctuation. However, you have some stylistic problems; a significant fraction of your prose is awkward and arrhythmic.
Amaranthe and Sicarius need room to breathe and develop. They must have backstories; I want to know about them. I look forward to seeing the novel mentioned in your afterword.
(review of free book)