First the harbor and ship look amazing, great job. Here are a few suggestions, if this game is still being worked on that is.
1. I think the environment and gameplay lends itself better if it was based upon Assassin's Creed instead of Dark Souls, so please keep that in mind.
2. I think the environment would look much better if it had way more buildings and trees.
3. What's up with the floating ship in the harbor? A ship would sit way lower in the water.
4. Assassinations from behind and a looting system would be a great addition.
5. Interactive NPC's for buying items and starting and solving quests.