• Timed Mode — Optional per-turn countdown timer (10s, 20s, or 30s). A random move is played automatically when time runs out. • Hint System — Playing against AI on Chill difficulty? Tap the lightbulb for a hint showing the best column to play. 3 hints per game. • Game State Persistence — Your game is now auto-saved. Leave mid-game and pick up right where you left off with the "Continue Game" button. • Board Color Themes — Choose from Classic, Ocean, Sunset, or Midnight board styles in Settings. • Win Streak Tracking — Your current and best win streaks are now tracked in Stats. • Quick Rematch — Play again or switch sides instantly after a game ends. • Drop Animations & Ghost Preview — Pieces animate as they drop, with a ghost preview showing where your piece will land. • Animated Board Clear — The board clears with a satisfying column-by-column cascade animation. • Reverse Mode — Try to avoid getting four in a row in this twist on the classic game. • Background Music & Sound Effects — Immersive audio with drop sounds, win celebration, and background music (toggleable in Settings). • Accessibility Improvements — VoiceOver labels and announcements throughout the game. • UI Polish — Gradient buttons, card shadows, circular win-rate ring in Stats, animated turn indicator, pulsing win highlights, themed board previews in Settings, and a refreshed main menu. • Bug fixes and performance improvements.