To Kamiya, the core theme of the game and its protagonist's attacks is "sexiness".[4][32] He said Bayonetta's ability to transform into a panther reflected the developers' desire to "make her a sexy witch".[8] To emphasize "her femininity and sexuality", the developers made Bayonetta lose rose petals instead of blood when hit, and used a butterfly motif that manifests in her wings (which appear in her shadow and during double jumps), her giant fist attack (a butterfly appears on the back of the fist), and the arms of her glasses.[33][34] Her giant boot, fist, and monster attacks reveal some of her body—her hair is magically formed into clothes but must be temporarily reallocated to forming offensive weapons—and when the player targets an enemy, red lips mark the enemy's chest; this led IGN to call the developing game a mix of "action and a great big helping of fan service".[2] The game's sexual tone is reflected in its age rating in the United States: the Entertainment Software Rating Board rated the developing game "Mature" ("M", for ages 17 and older) for containing "Partial Nudity" and "Suggestive Themes", as well as "Blood and Gore, Intense Violence," and "Strong Language".[2] (By comparison, Japan's Computer Entertainment Rating Organization rated the game "D", also for those ages;[35] the British Board of Film Classification rated the game "15" for "strong language and bloody violence";[36] and it is rated "18" under the PEGI system used in the United Kingdom and other European countries for its use of violence and language.[37])