Kung Fu Kid is a Sega Master System video game about a kid that has knowledge of kung fu (including the fascinating art of wall jumping). This action game tests his skills as he defeats terrible enemies in order to save the day. It was released for the Sega Mark III in Japan as 魔界列伝 (Makai Retsuden?). Source: Wikipedia, "Kung Fu Kid", available under the CC-BY-SA License.