Well I mean, mechanically it totally is a ripoff. At least when playing as Naomi. And artistically its very "Anime CV" (so Rondo) but in terms of gameplay style, I'd say its pretty different. It has some Ninja Gaiden spice thrown in (not so much with difficulty or unfairness but NG and BEP have enemies that move more aggressively) and a level design style that's a bit more platformy. A cool comment I've gotten unprompted from several people who've played it is it feels like one continuous world? Like there is a sense of place and structure thats noteworthy... which I love hearing, because I feel like if I have any strength as a game designer its my level design (because lets be real, mechanically I've never done anything particularly interesting. I've only stolen things that would be interesting)