This game is great fun, even for me (in my few chances to play it). The violence is not concerning to me except for very young children. It's very cartoonish violence: you shoot enemies and they bloodlessly and cartoonishly explode into bolts (not even as bad as I make it sound). The only concern is that it contains a fair amount of crude humor. Gameplay-wise it is fun, light, and hilarious. Good platforming, good combat, crazy weapons, and generally good clean fun.
We enjoy this game very much as a family. Hubby and I have to help the kids out on some of the harder time puzzles, but it is a great family game that we all enjoy!