1. I really hope we get a chapter fleshing out all the characters a bit more, they have names and faces but they feel like the serve a purpose to the story. (but don't take that from me, I spend more my time making "set-dressing" then actual characters)
2. I like the atmosphere of the fortress, don't be afraid to take a moment to describe the scene. (again I like to make set dressing) Example: The medicinal bay stunk of blood and decay, not really a shock since that stone-faced "Head of Medicine" was not really keen on 'bedside manner'. If it worked, he'd do it, no matter how messy or painful. That shocking reminder of which echoed out from the doors and from behind privacy curtains, as his patients wailed in pain or whimpered hoping that their 'doctor' would fix them so they could leave this wretched place. What didn't help was how bright it was here, it felt like the sun was constantly shining in this sterile place, but without the warmth. [Pretty much described the place as a hospital, run by a guy without any emotions, and that it was brightly lit but cold]
3. This is more a personal thing and I know I'm guilty of this, but try and make the posts longer. You probably have a very busy life, but don't be afraid to postpone a few chapters until you got a meaty chunk to post. If you just give regular updates of where you are on the current chapter then it'd be just fine... but that may just be me being greedy.