> "to target children with ads about the newest mobile game"

They aren't. The target for those games are middle aged, "middle class" women. Especially childless women. You just don't realize that the loud sounds and bright colors appeal to another demographic other than children. Usually those games are terrible for (as in the children don't like them) children. Its because those are usually pay to win games and adults can just out-spend them (and the adults are often terrible winners).