Audio problem: The lengthy tutorial for the game is carried through by the character Kiki, Mr. Mu's aide. The text balloons are mostly fine, but each line is also dubbed, in a language that tries really hard to be English, but is obviously read by a non-native speaker and butchered to the point of being barely if at all intelligible.
Other mistake: In the cutscene at the end of chapter 4, it is said that Ikki was hit by "This own technique", instead of "his own technique."