The brown thing is naked almost the entire time. But there's nothing explicit, so I guess it's fine.

Cartoon violence

No swearing on this show, but just occasional insults, which is formatted outside Adult Swim. Swearing occurred in the adult oriented pilots before the official series.

None

Some of the character designs can be seen as creepy, with their bulging eyes and odd body shapes. Also, there are a lot of flashing, bright colors commonly seen in the show, in many episodes. It's recommended that you take caution with watching if you have epilepsy, or are sensitive to bright lights.

The animation is quite creepy.

I wouldn't recommend the show for young children.