The Legend of Zelda: Link's Awakening DX is an updated version of an older GB game which adds color, an additional dungeon, various other minor features, and a lot of bug fixes. Link, after rescuing Hyrule (again?), sets off on a journey and subsequently shipwrecks on the mysterious Koholint Island, which has been overtaken by evil monsters which he must defeat in order to find a way back home.
You can watch the complete run being played back on a console.