Cute Mermaid Puppy Undersea Game Start Screen

A bright, fantastical 3D underwater game launcher is placed within a rounded rectangular app window, designed like a sophisticated login page for a children's casual game. The scene is a colorful underwater world, with warm sunlight streaming through clear turquoise water, soft bubbles floating around, and the sandy seabed covered with corals and shells in soft hues. On the left, the prominent large Chinese title dominates the center of the image: "Bubble Bay Mermaid Dog Rescue Team," with a smaller line above it reading "Underwater Rescue Begins!" and a subtitle below: "Collect Shells, Help Turtles, and Light the Lighthouse with Little Puppy." All text uses a clean, modern UI font, with the title in very large, deep navy blue characters. On the right, an adorable mermaid puppy character inspired by preschool adventure animation is placed: a smiling puppy with cream and light brown fur, large violet eyes, cyan accessories on its drooping ears, a purple seashell necklace, and a mint green mermaid tail, floating vertically in the water. The character is surrounded by a magical coral reef environment, featuring 10 prominent foreground and midground marine elements: a purple rock arch on the far left, a pink starfish attached to the coral on the left, a pale purple clam shell in the lower left corner, a large pink branching coral in the center foreground, a pink seashell in the lower right corner, an orange starfish on the beach in the middle right, a blue porous rock in the foreground on the right, a cluster of blue tubular coral on the far right, a tall pinkish-purple coral tower behind the character, and an orange flower-shaped coral next to the tower. Soft hues of aquamarine, cyan, pink, pale purple, peach, and coral orange are used to create a glossy, toy-like texture and a soft depth-of-field effect. Three rounded UI buttons are arranged horizontally in the lower left corner: a yellow main button with a play icon labeled "Start"; a white secondary button with a circular target icon labeled "Level Selection"; and a white secondary button with a star icon labeled "Sticker". Additionally, a small circular settings button with a gear icon is added in the upper right corner. Overall style: The startup screen of a high-end children's mobile game is playful, healing, with cinematic lighting and high-end 3D illustrations, making it both friendly and captivating.