Idle Fishing Game Builder

One prompt that builds a complete idle fishing game in a single HTML file, with a new twist: catch and release is an investment. Each fish shows its size, weight and coin value; keep it for coins or release it and it keeps growing, even while the game is closed. 3 lakes, 36 species, a reel mini-game, helpers with catch rules, upgrades, breeding for rare colours, a field guide, 30+ achievements, offline progress, touch and keyboard play, attract mode, demo switch.