Big-City

Big-City is World 1 of the game Donkey Kong for the Game Boy. After Donkey Kong gets defeated in World 0, the construction site, he takes Mario's girlfriend Pauline and escapes with her to this city. Mario chases them from behind. The city introduces most of the new gameplay elements of the Game Boy game, such as Keys that need to be taken to Doors to proceed in the levels, as well as Roads and Ladders that can be freely placed. Big-City features 8 stages, 2 of them are boss fights with Donkey Kong. Mario has to defeat Donkey Kong with barrles in stage 1-8.

Items and Objects
Big-City introduces the following new items: The following objects and obstacles make their first appearance:
 * Key
 * Trash Can
 * Road
 * Ladder
 * Door
 * Rope
 * Spikes

Enemies
Big-City introduces the following enemies:
 * Rappy
 * Oil
 * Bowbow
 * Spark (previously seen in Donkey Kong Jr.)
 * Trash Can
 * Walking Flame