... I do wish rolling had i-frames, but that's just because I'm too used to those and I keep screwing up my rolls... Oops.
Having now finished it: I reinforce my earlier comments. It's fantastic. I'm only a *little* salty that you can't screenshot any of the frankly beautiful scenes at the end.
Welcome to your niu world ! We are a cute and loving international community Ｏ(≧▽≦)Ｏ !