J.J. & Jeff are bungling detectives in the same vein as Inspector Clouseau. They are out to solve a kidnapping case. In the Japanese version, Kato-chan & Ken-chan, it is based mostly on the "Detective Story" segments of the show. There are three ways to attack enemies in J.J. and Jeff. One is to jump on top of them in an attack echoing Super Mario Bros. The second way is to spray enemies with a can of spray paint. The third is to kick enemies. The game included six levels (fields) split into four parts, even though the manual says there are a total of 8-levels.