FG66 is a spot-the-difference adventure set on a night river fishing village where golden coins hide inside floating lanterns. Players compare two nearly identical riverside scenes, tap every mismatch, manage lantern lives, and reveal concealed clues with Lantern Sight. Eight progressive delta levels raise the challenge with timers, star ratings, and on-device progress. The app also includes village lore, a gold vault, achievement marks, a travel journal, how-to guidance, and local settings. A fast English loading screen opens the Bengali experience in a full-screen web view, keeping this distinctive FG66 river journey focused and self-contained.