Pastel Underwater Mermaid Puppy Game UI

The game's start screen is an adorable side-view underwater casual game, featuring a soft 3D cartoon style, designed like a delicate children's web game interface. The scene showcases a bright underwater world, with sunlight streaming through clear blue water, accompanied by floating bubbles, silhouettes of small fish in the distance, and a dreamlike coral reef environment filled with rounded pink, purple, blue, and mint green corals, seaweed, shells, rocks, and sand. Slightly to the left of the center, a mermaid puppy character inspired by a rescue dog cartoon floats happily underwater. It has a puppy face, sparkling eyes, drooping ears, a small crown-like ornament on its head, and a fish tail instead of hind legs, facing forward with a joyful expression. To the right stands a whimsical candy-colored coral lighthouse, shaped like a pink and white seashell tower, with a glowing lighthouse at the top, a pearl embedded in the roof, round seashell windows, a small balcony, a purple door, and coral details at the base. The game's UI elements are directly overlaid on the scene: In the upper left corner are two rounded white capsule buttons, the first labeled "Go to the Lighthouse," and the second displaying "0/3"; in the upper right corner is a round white pause button with a pause icon. Near the lighthouse, four semi-transparent colored target rings float on the interaction points: a pink ring near the upper-middle window, a yellow ring near the upper right lighthouse area, a light blue ring covering the lower right shell window, and a ring with a large white outline surrounding a purple jellyfish in the lower left. Three collectible shell/pearl items are visible in the scene: a glowing gold pearl in the open shell at the center, a small dark blue pearl shell at the bottom of the lighthouse, and a red pearl shell on the UI panel at the bottom center. At the bottom center are three rounded white operation prompt buttons with the text: "Arrow keys/WASD," "Space/Enter: Place bead," and "Esc: Return to map." A large, semi-transparent, rounded white panel is added behind the bottom operation buttons. The overall visuals should evoke feelings of joy, safety, color, and wonder, featuring a high degree of sophistication, soft depth of field, gentle lighting and shadows, a glossy toy-like texture, and aesthetics suitable for children's mobile or web game use.