Wow! Good job with your explorations. Vampires and ghosts are killable and will get you further along your quest(s). Chatting with people in town might hint at how it’s done. They should both have a typical health that is positive. You might have found a bug if it’s not the case. Please share a screenshot and I will do my best to fix it.
Amulets are active as long as you have them in your inventory.
Perception is not fixed. If you find a way to improve it, you might have an easier time interpreting your inventory stats.
There are two monsters with colour illustrations. Those were done before we settled on the more old-timey line-art/wood-cut style. The two will probably be redone in that style at some point.
Knives are not throwable, but daggers are. How to do that should be fairly obvious when you have a target in range. Long-tap/right-click might help. The dynamite is not throwable yet, but it will be in the future.
Not posting any spoilers here, send me a private message if you need further hinting.
I’m taking notes of your other suggestions for future improvements of the game. Thank you!