gameplay mechanics based on the information you provided:

Objective: Donkey Kong balances on a barrel while juggling pineapples and avoiding fireballs that fall from drums. Scoring: Each time Donkey Kong catches a pineapple, he earns a point. If he loses a pineapple, Mario laughs at him, and this results in a miss. If Donkey Kong grabs a fireball, he flails and also gets a miss. Special Scoring: When Donkey Kong reaches 300 points without any misses, the points double. However, if he gets a miss after reaching this score, the doubled points stop, and any previous misses are cleared. Game Over: The player loses the game after three misses.