Thanks for the feedback!
I wanted to do a normal training of the combat system (and not only) in the form of a simulation (with an animation of an attack in the opposite direction (not an arc) and an explanation of why you shouldn't do it). But I didn't have time.
Difficulty... Well, the long testing of the game played a cruel joke again. After a month of practice, the game really seems easy.
But you didn't guess the animation technology. Only mathematics, only hardcore!)