Cumulus Farm

Develop a playful mobile-first pixel-art weather postcard application named Cumulus, which converts simulated weather forecasts into immersive interactive visual scenes as the core experience. First, build the core interactive features: enable users to freely switch between city-specific postcard styles, add a sun slider component that supports scrubbing through the entire 24-hour timeline of the day to dynamically adjust the corresponding scene changes, provide a dedicated sky mood lock function that allows users to manually fix the scene to one of five modes including clear, cloudy, rain, storm, and snow, and add a tap interaction for animated wandering animals that appear on the horizon, triggering small feedback effects when clicked. Then, construct the interface layout: use canvas rendering technology to draw the dynamic sky and ground elements at the core of the postcard, integrate matched forecast overview details, hourly weather condition cards, weekly forecast rows, and compactly arranged key weather statistics into the interface, ensure all components adapt perfectly to mobile screen sizes, maintain a consistent warm and playful pixel art style across all elements, and optimize the interaction fluency to guarantee smooth switching between postcards, slider dragging, and mood locking operations, delivering a lightweight, interesting and highly interactive weather app experience that differs from traditional functional weather applications.