DoReMi Fantasy is an action platformer in the Milon's Secret Castle franchise. Traveling through many different worlds starting with the forest, Milon will be confronted by many enemies. Milon can either shoot bubbles to trap and send his enemies away, or he can jump and flatten his enemies temporarily turning them into a platform for him to walk across. Milon has three different "outfits": red, blue, and green. With the green outfit, Milon can withstand three hits. Each time he gets hit, he will be downgraded a color - green to blue, blue to red. If he gets hit with the red outfit, he will die and have to start the level over. By collecting 100 music notes, Milon will get an extra life. There are also other useful items to get like bubble gum that will save Milon once if he were to fall, a special bubble shooter that let's him shoot multiple bubbles at once and a star that makes Milon temporarily invincible so that he can defeat enemies simply by running at them. The game was originally only released in Japan for the Super Famicom, receiving a release later for the Wii Virtual Console in North America and Europe under the new localized name, but still only in Japanese language.