The "Donkey Kong Country" SNES trilogy games are primarily platforming games in which players complete side-scrolling levels to progress forward. Each game contains approximately 6 to 8 different 'worlds,' each of which contains 5 or 6 levels and a boss character battle which advances the player to the succeeding world. Each world is uniquely themed and levels consist of tasks such as swimming, riding in mine carts, launching out of barrel cannons, or swinging from vine to vine. Each game also includes two main playable Kong characters; if both Kongs are together, one follows the other (which the player controls), and the player can switch between them as needed. If the lead Kong then gets hit by an enemy, he runs off the screen and the player will take control of the other Kong until they can later free the first one from a barrel. If the Kong is hit by an enemy when traveling alone, the player loses a life. To defeat an enemy, players can either execute a roll, jump or ground slam which can also unveil secret items. However, some enemies cannot be taken down like this, so the player must either throw a barrel or use the assistance of a friendly animal. The player can gain additional lives by collecting items scattered throughout the levels, including 100 bananas; all four golden letters that spell out K–O–N–G; extra life balloons; and golden animal tokens that lead to bonus levels. There are also many secret passages that can lead to bonus games where the player can earn additional lives or other items.