It was fun all the way through. When you use the rage effect you feel god-like and the play style is a blast.
That said it gets repetitive and the final level and its subsets feel more like a hassle than an experience. For a game that has obvious offline/online multi-player possibilities and could have better looking attack effects like we were playing a demon slayer game or something, it spell weakens, splutters and dies by the end when you final say, "F*ck it, let me finish it so I can brag that I could finish such a difficult game," because it does get punishingly difficult all of a sudden by the last zone.
I'd still recommend this for every player. After playing this, your staying power for Elden ring and Darksouls should increase atleast by a bit