Harvey "Hank" Kramer was a freelance game designer and sculptor. He served as head designer for Ideal in the early 1960s.
In a 2004 Denver Post article about Kramer's daughter and grandson ("Boy Wonder" by Michael Booth), Kramer is described as a hard-drinking toy designer who didn't like children. He's cited in the Post article as creating many of Ideal's most famous games, including several that are not typically assigned to him. The list includes Mouse Trap. Score Four, Hands Down, Kaboom, and Ker-Plunk.
According to an online biography of producer-director Khashyar Darvich, who served as Kramer's personal assistant in Boulder, Colorado, in 1991, Kramer had multiple sclerosis but was still active. Darvich notes that, in addition to his game design credits, Kramer sculpted the famous horse logo for the Ford Mustang and designed the iconic advertising character Mr. Clean.