According to ESRB, this game contains: Animated Blood, Mild Suggestive Themes, Mild Violence.
There is very little for Parents to worry about with Crush. The violence involved in the game only goes as far as squashing bugs, and the adolescent romance suggested in the cut-scenes is about as innocent and vaguely hinted at as you could imagine. Only the impressively eerie, nightmarish audio design could really be seen as unsettling for minors.
PSP owners looking for a journey-shortener will be very well served by Crush. The sensibly-sized levels offer addictive gameplay, but also a sense of narrative progress and heroism that is perhaps missing from the format's less personable puzzle games, like Lumines and Mercury. For such an original game, Crush is also good value. It's polished enough that all 40 of the taxing levels are worth replaying, either for their own sake, to unlock bonus artwork, or to reach a new best time in the unlockable time-trial mode.
Deaf and Hard Of Hearing Gamers will find all spoken audio displayed in subtitles and should not be caught out by any of the game's puzzles, which are all visual and never reliant upon sound.