According to ESRB, this game contains: Mild Violence
Parents, there's no objectionable content unless you take offense to looking at or punching cartoon-style rats that disappear in a puff of smoke. However, be warned that the real danger of Sneakers is its power to induce bad behavior in young children and violence in older ones. The brain-dead structure, complete lack of engagement and frustratingly play won't even keep the kids quiet for an afternoon. If you've absolutely GOT to have a mouse action game, go for Stuart Little 2 instead, provided you have a PlayStation.
Hearing Impaired gamers can "enjoy" the witless dialogue through the game's full text, but I can't imagine they'd want to.
Everyone else, don't even bother.