The interface of Flash Focus was compared much to Brain Age in the sense that it retains the same calendar interface, requires the player to sign his or her name in a box, and allows the player to design the calendar stamps. It also has a "check" program and a list of exercises, and players gradually unlock further exercises as they accumulate stamps, like Brain Age. Unlike Brain Age, the player holds the game horizontally instead of rotating it 90 degrees. Unlike the Brain Age series, where the face of creator Ryuta Kawashima prominently appears in the game, Ishigaki's face does not appear in Flash Focus.