Jankenman, a Japanese release, is likely based on the popular Japanese game of rock-paper-scissors (Janken). Gameplay would probably involve a series of matches against the computer, utilizing the Game Boy's buttons to select one's choice.  Simple graphics and a straightforward game structure would make it accessible to a wide range of players. Given the simple nature of the source game, it's likely a concise and easily accessible title. Further details on the specifics of the game are scarce.

Jankenman (Japan)

Jack Nicklaus Golf (USA, Europe)