Interface de Jogo Subaquático de Cão Sereia

A cute side-view underwater casual game start screen in a soft pastel 3D cartoon style, polished children's browser game interface. Setting: Bright ocean floor with sun rays streaming down through clear blue water, floating bubbles, distant tiny fish silhouettes, and a dreamy coral reef with rounded pink, purple, blue, and mint corals, sea plants, shells, and sandy ground. Subject: Slightly left of center, a small mermaid puppy character floating happily underwater, featuring a puppy face with big sparkling eyes, floppy ears, a tiny tiara accessory, and a fish tail. On the right, a whimsical candy-like coral lighthouse shaped like a pink-and-cream seashell tower with a glowing lantern room, a pearl on the roof, circular shell windows, a small balcony, a purple door, and decorative coral at the base. Game UI overlay: At top left, two rounded white pill buttons reading "[去灯塔]" and "[0/3]"; at top right, one circular white pause button. Near the lighthouse, four translucent colored target rings float over interactive spots: pink near the upper windows, yellow near the lantern, pale blue over a lower window, and a large white-outlined ring around a purple jellyfish lower-left. Collectibles: 1 glowing golden pearl in an open shell near center, 1 dark blue pearl shell near the lighthouse base, and 1 red pearl shell on the bottom UI panel. At bottom center, a semi-transparent rounded white dock panel with three control hint buttons reading "[方向键 / WASD]", "[空格 / 回车：放珠]", and "[Esc 回地图]". Glossy toy-like materials, soft ambient lighting, gentle depth of field.