Create a visually stunning 2D scene that showcases an indoor cave environment, with a hand-painted artistic style. The composition should offer a front-facing view, allowing the observer to appreciate the intricate details and craftsmanship of the artwork. The cave's interior should be rich with various textures, such as rough and smooth surfaces, portraying the natural beauty of the rock formations. Utilize a harmonious color palette to accentuate the depth and dimension of the cave, while maintaining a flattened aesthetic. Incorporate atmospheric lighting that casts subtle shadows and highlights, enhancing the overall ambience of the scene. Additionally, consider integrating organic elements like moss, vines, or dripping water to increase the visual complexity and realism of the environment. By incorporating these elements, the final design will result in a captivating game art piece that showcases the beauty and intrigue of a hand-painted, 2D cave scene.