This poster is about war and peace. Since the war started In Russia people are not allowed to use freely words "война" (which means "war", in Russian it contains 5 letters) and "мир" (which means "peace", in Russian it contains 3 letters). People are not even allowed to make any hints related to this words.
Under dictatorship a person becomes a puppet. Sometimes a dead puppet.
What during the times of peace is an innocent children game - cut out paper puppet, in wartime can be seen as a dead body senselessly killed by the state