Ronald McDonald, the mascot of the McDonald's chain, discovers a piece of a treasure map while walking in the Magical Forest one day, and decides to go on a treasure hunt with it. There are three other map pieces, each in the hands of villains Ronald must defeat on the treasure hunt he decides to take.
The game plays similar to a traditional platformer, with four worlds, each split into a number of smaller stages. The object of each stage is to get to the exit that leads to the next, avoiding hazards and destroying enemies on the way. Ronald has a magic attack performed by pressing the button, which can be upgraded twice by collecting certain power-up icons. Ronald has a magic scarf that can be thrown upwards with the button to hang from handles.
Ronald's health is measured in a meter of red gems in the bottom-left of the screen. A special power-up can increase the number of gems that can be held at one time, increasing Ronald's maximum health. Red and white flowers can also be collected, and if Ronald collects two red flowers or three white flowers, he will earn a gem back. If he is at full health, the flowers will be stored until Ronald takes damage, giving him an extra hit. Ronald can also collect balloons, activated when he falls into a pit, using them up and floating Ronald to safety instead of having him lose a life.
Certain doors, when entered, will lead to a shop where Ronald can use collected gold to purchase extra power-ups, like gems, flowers, and extra lives. Other doors will lead to a minigame where the player must control and rotate falling blocks, matching the shapes on them to earn extra power-ups.
Near the end of each world, Ronald will meet another McDonald's character, who will require a few gems before opening the path to the world's boss. Each boss is fought by dodging their attacks and moving into their gem-stealing beam, attacking them while they are eating it.
The "Native" enemies present in the Japanese version of Treasure Land Adventure were changed to robots in the international release, presumably to avoid black stereotypes.