Sunny Flight, as its name implies, is a realm filled with sunlight in a mid-summer setting. The world itself consists of a series of train tracks going over, around, and through a hilly, green island which is littered with clusters of large, blue crystals and surrounded by tranquil water. There are distant, rainy-blue mountains seen in the background.
Trains puff around on the tracks, each containing two explosive barrels with targets painted on their sides. Pilots in single-propeller planes encircle a tower in the water on which a giant, luminescent green gem rests. A tunnel lit by blue crystals protruding through the walls leads to an outcropping at the center of which a large purple crystal cluster stands, illuminating the walls with a lavender hue under a similarly colored sky and an enormous, peaceful crescent moon.