There is sometimes a lag when you attack, it's what kills me all the time and it's very annoying. I miss the attack and get teleported on the monster :/
Also when you retry, the options you disable (shadow etc.) are reanabled, so you have to "enable" their button and disable them again after, but it doesn't stop the critical lag anyway.
I gave up at difficulty normal. Unlocked the knife but it's way too short