Donkey Kong is a 1994 platform game developed by Nintendo for the Game Boy handheld video game system, which also contains puzzle elements. Donkey Kong is loosely based on the 1981 arcade game of the same name and its sequel Donkey Kong Jr. The game was known under the working title Donkey Kong '94 before the release. Like in the original arcade and NES version, the player takes control of Mario and must rescue Pauline from Donkey Kong (who are both given updated character designs for this game). Donkey Kong Jr. makes a guest appearance in the game on some levels, helping his father hinder Mario's progress. This was the first Game Boy title designed with enhanced features when played on the Super Game Boy. It features gameplay elements from Donkey Kong, Donkey Kong Jr., and Super Mario Bros. 2.