You can view of official ESRB rating for Clones here. Clones is rated E for everyone. Even your grandma can play!

Platform: Windows PC    

Rating: Everyone

Content descriptors: Mild Cartoon Violence

Rating summary:

This is a puzzle-platformer game in which players control different colored "clones" and guide them through various levels. As players use their clones to fly, dig, and drill, they must avoid obstacles such as lava pits, electrical traps, spears, and rolling balls. The "cartoony" clones sometimes get zapped, singed, or crushed from the obstacles; the small clones also break into bits under heavy blocks.