 The player , as Donald , ventures through a variety of side @-@ scrolling levels . Generally , each level is divided into an overland part and a dungeon , such as the <unk> 's palace or the temple in which the Great Duck Treasure resides . Although the player may choose any order to play the overland sections , various obstacles prevent the player from entering the <unk> outside of a specific order . In addition to this , some levels provide the player with vital clues which solve puzzles needed to progress in later sections . Once Donald has completed the overland section of an area , he may leave by calling his nephews ' biplane , and will return to the dungeon entrance of that area if the player chooses to return . 
