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A polished Sudoku app with key features, smooth feedback, and refined UI.
🎮 1. Difficulty Selection Screen Available difficulty levels: EASY MEDIUM HARD EXPERT After selecting a difficulty, the app loads a puzzle set from internal storage (JSON or DB) and starts the game. ------------------------------------------- 🔄 2. Continue Game (Resume) Automatically saves all game progress: Current board state (9×9 grid) Notes (memo numbers) Timer progress Remaining lives On app restart, a "Continue" button appears if saved data exists. Uses SharedPreferences or Room Database. ------------------------------------------- ⏱️ 3. Timer & Pause System Displays elapsed time (e.g., 00:12:51) Pause button: Freezes the timer Blurs or dims the board Shows a “Resume” button Resume button unfreezes the timer ------------------------------------------- 🏆 4. High Scores Stores the best clear time for each difficulty After clearing the puzzle: If faster than the previous record → show “New Record!” popup Data stored using SharedPreferences or Room ------------------------------------------- ❤️ 5. Life System (3 Mistakes) Player has 3 lives When entering a wrong number: Number turns red for a moment (error highlight) Device vibrates briefly One life icon disappears When life reaches 0: Bomb explosion animation “Game Over” popup with Restart option ------------------------------------------- 🎉 6. Game Clear System Upon completing the puzzle: Show Thumbs Up icon animation Display colorful confetti fireworks animation Show Clear popup with: “Restart” “Go to Difficulty Selection” ------------------------------------------- 🔘 7. Button Features ✔ Undo Uses a stack to store previous states Multiple undo steps supported ✔ Eraser Clears the selected cell ✔ Notes (Memo Mode) Allows input of small candidate numbers Toggle button: Note ON / OFF ✔ Hint Fills in one correct cell Optional limit based on difficulty ------------------------------------------- 🧩 8. UI / UX Enhancements ✔ Highlight System Highlights: Selected cell Row & column 3×3 block Same numbers on the board ✔ Error Feedback Red numbers on wrong input Short vibration feedback ✔ Modern UI Design Soft pastel or dark theme Rounded cards for grid and buttons Material You / Material 3 styles ------------------------------------------- 📱 9. Modern App Icon Possible styles include: Minimal “9” or Sudoku block Clean 3×3 grid design Cute cartoon block characters Premium blue / gold gradient icon