One episode in season 2, has Etno mentioning to his past self that if they were the opposite gender then they could be married.

There are tons of cartoony violence especially in season 2 although no gore is seen at all.

A few episodes in season 1 has characters holding guns although they usually look like trumpets.

Even though it's rated TY-Y in season 1 a few profane words can be heard.

Both Seasons have name calling.

Season 1's artstyle can scare some young kids.