According to the ESRB, this game contains: Mild Violence, Suggestive Themes
Parents shouldn't be too concerned about the violence in this game. Most of the things that qualify are totally absurd like shooting blow darts at romantic rivals falling from the sky, or throwing snowballs at your girlfriend. There's absolutely no blood or gore at all, and if memory serves I don't think there was even a single gun in the entire game. However, there are definitely some non-explicit themes and innuendo present. Although all the characters in the game are black silhouettes without any detail, some of the poses and actions are fairly suggestive. Some of the voice samples may raise an eyebrow or two, also.
Fans of XY/XX will want to pick the game up, it's got the same crazy story and snappy visuals, but this time there are approximately twice the number of minigames and the difficulty overall is more balanced. It doesn't cover any new territory, but it's well done if you like the formula.
DS players in general may want to wait for the game to drop in price or pick up a used copy. The playtime is very short, and the game can be completed in just a day or two. Also, be aware that it's nothing but minigames from start to finish, so players hankering for something a little meatier might want to put their dollars elsewhere.
Deaf and Hard of Hearing gamers won't have any problems for the most part, however there is one specific minigame that I could imagine being very difficult complete without being able to hear the auditory cues given by the in-game girlfriend. There is a visual cue to use in this situation, but it's a lot easier to listen for the sound. Besides that one example, there were no other situations that required hearing, and all the dialogue was presented through subtitles.