I have not played much of the game, but I do like what I see so far. I have not been playing Souls games for very long, but I have quickly become a huge fan. Your game has all the core elements that make these types of games great and it has a respectable level of polish to it. I'm sure I will spend a good deal more time at some point playing Seal Breaker.
Now as for the main reason why I have only play maybe 10-15 min of the game so far is the reason why I am writing this as well as why I even created this account. There is a huge bug I have run into multiple times already in my brief play time. Some bug occurs causing me to be unable to attack. Both mouse buttons do not do anything. I can consistently fix this by simply using an item. When I use an item while experiencing the bug, the melee attack animation goes off immediately and it even damages an enemy if one is near.
I am not entirely sure what causes it, but it happened enough to be a problem. I'm guessing there is some problem with the attack animation being interrupted. I tried to reproduce it by either walking backwards while attacking or getting hit while while attacking, but I could not purposefully initiate the bug (not that I spent much time on it). I hope this helps you make the game better better.
My only other criticism is the general feel of playing the game is rather sluggish. I'm not sure how best to describe this, but it just does not feel as responsive as I would like. Making everything a bit faster might give it a better feel.
Overall, I do think you have made a good game here. I could even see using rogue-like elements with procedurely-generated areas and random monsters/loot being fun with the gameplay you have already created. I look forward to delving through what you have already created once I have the time.