Cozy Pixel Aquarium Game

Create a cozy pixel art aquarium game with one prompt for Claude Code. It builds a playable browser fish tank game in a single HTML file with no assets: keep 14 fish species with schooling AI, feed with sinking flakes, wipe algae off the glass, collect coins and pearls, breed baby fish, place castles, coral and sunken ships, and watch visitors tip you. Fish shop, fish book, upgrades, tank themes, glowing night lights, lo-fi music and saved progress. Works offline.