Very nice game overall. It's well balanced in general and the explanation is good (although it's a long process to understand in one or two try). For the downside of the game, I think the game have too many words for incantations, I was just spamming to look for the good one. Some tracking patterns are way too hard/fast (it's quicker to skip them for me at least). And last thing, I never found how to use "Vocare", I don't know where it is or how I'm supposed to find it.
But I really enjoyed the game ! The sound desing and the game visuals are great, it was a cool experience.