Donkey Kong Jr. is an action-adventure game where you play as Donkey Kong Jr., the son of the titular character. The story follows Donkey Kong Jr.'s attempt to rescue his father from a group of scientists who have taken him captive. As Junior, you must navigate through various levels, collecting bananas and avoiding obstacles while solving math problems.
The gameplay involves moving up and down vines to reach platforms, all while answering math questions ranging from simple addition and subtraction to more challenging multiplication and division. The faster you answer the questions correctly, the more bananas you'll collect, which will give you an edge in your quest to rescue Donkey Kong Sr.