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## 1. Project Overview - **Project Name**: Spot the Difference - **Type**: Casual Puzzle Game - **Target Users**: Players who enjoy puzzles, challenges to reaction time, and observation skills - **Platform**: Android, pure Java, English version, available on Google Play - **Core Gameplay**: In an N×N grid, all grids display the same image. A different image is randomly inserted. Players must find the different image within a time limit to pass the level. --- ## 2. Core Gameplay 1. Each level displays N×N grids. 2. Each grid displays the same image by default. One or more grids are randomly selected to display different images. 3. Player clicks on different grids: - Correct: Mark the grid, adding to progress - Incorrect: Deduct time or add to error count 4. Find all different grids within the time limit → Pass the level Timeout or exceeding the error limit → Game over 5. Difficulty and Levels: - Higher difficulty: Larger number of grids (e.g., 3×3 → 6×6 → 10×10), more different images, shorter time limit 6. The game supports timing, scoring, and leaderboard functions --- ## 3. Page Design and Functions ### 3.1 Startup Page / Main Menu - **Elements**: - Game Logo - Buttons: Start Game, Level Selection, Achievements, Leaderboard, Settings, Help - **Functions**: - Click "Start Game" to enter the default level or the last unfinished level - Click "Level Selection" to enter the level map - Click "Achievements" to view unlock status - Click "Leaderboard" to view global/friend rankings - Click "Settings" to adjust game parameters - Click "Help" to view game rules --- ### 3.2 Level Selection Page - **Elements**: - Level List (paginated or scrollable) - Each level displays grid size, number of different grids, and whether it is unlocked - **Functions**: - Click on a level to start the challenge - Unlocked levels will be displayed as locked - Display historical completion scores (time, number of errors, score) --- ### 3.3 Game Main Interface - **Elements**: - N×N grid area, each grid displays an image - Countdown timer - Number of found / Total number of different grids - Pause button - Hint button (limited uses) - **Functions**: - Click on a different grid → Highlight the marker - Incorrect click → Deduct time or record the number of errors - Countdown ends → Failure - Find all different grids → Successfully complete the level - Hint button → Temporarily highlight the position of a different grid - Supports landscape or portrait mode adaptation --- ### 3.4 Achievement System Page - **Example Achievements**: - "Beginner": Complete the first level - "Fast Hand": Complete a level within 10 seconds - "Zero Errors": No errors in a level - "High Difficulty Challenge": Complete the highest difficulty level - **Features**: - Displays unlocked and locked achievements - Click on an achievement to view a detailed description --- ### 3.5 Leaderboard Page - **Categories**: - Global Leaderboard - Friends Leaderboard - This Week/Historical Leaderboard - **Display Information**: - Player Nickname/Avatar - Completion Time, Number of Errors, Score - **Features**: - Leaderboard Refresh (Daily or Weekly) - Supports switching between different categories --- ### 3.6 Settings Page - **Features**: - Sound Effects On/Off - Background Music On/Off - Hint Count Default Setting - Game Difficulty Default Setting - Language Switch (Chinese/English) - **Features**: - Save User Settings to Local Storage - Load Settings the Next Time the Application Launches --- ### 3.7 Help Page - **Content**: - Game Rules Explanation - Operation Method - Achievements and Rewards Explanation - Difficulty Description