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Dino Dash is a pixel-style endless runner game. Players control a small dinosaur as it dashes across a desert landscape. Tap the screen to jump, avoiding cacti and birds. The pace of the game gradually increases over time, testing your reaction speed and rhythm control.

III. Core Gameplay
1. Game Rules
Tap the screen to control the dinosaur's jump.

Avoid obstacles (cactus and birds).

The longer you survive, the higher your score.

The game speed gradually increases over time.

Hit any obstacle and the game ends immediately.

2. Game Objectives
Survive longer to get a higher score.

Try to break your own high score.

Learn the patterns of obstacles and achieve precise jumps.

IV. Functional Requirements
1. Game Interface Components
Area
Function Description
Main Menu: Displays the game title, character animation, start game, settings, and high score buttons.
Game Main Screen: Displays the dinosaur character, dynamic background, obstacle spawning, and score counter.
End Screen: Displays the current score, best score, replay, and return to main menu buttons.
Settings Screen Functions include sound effects, character selection, and theme switching.

Character selection interface: Preview and switch dinosaur skins.

Background theme selection: Preview three styles: day, night, and dusk.

2. Core Functional Modules

Module Functional Description
Character Control: Click anywhere to control the dinosaur's jump, supporting different heights and reaction frames.

Obstacle Generation: Randomly generate cacti and birds in the air, supporting different combinations and frequencies.

Score System: Real-time score accumulation, calculated based on survival time and successful obstacle avoidance.

Difficulty Progression: The game speed increases by one level at a time, increasing the challenge.

High Score Record: Store local high scores and display them for comparison at the end of the game.

Customization: Select different character skins and background themes, and save player preferences.

Sound System: Sound feedback for jumping, scoring, and failure, which can be turned on/off.

V. Non-Functional Requirements
1. UI Style: Pixel art style with modern gradient elements.

Dynamic background with sun/star animations and floating clouds.

Rounded corners and gradient button design for a clear and intuitive interface.

2. Sound Feedback
Jump Sound Effect: Crisp bounce

Score Sound Effect: Increasing beep

Collision Failure: "Explosion" sound feedback

Supports one-click muting and real-time volume adjustment

3. Compatibility Requirements
Supports mainstream devices with 16:9, 18:9, and full-screen displays

Minimum support for Android 8.0 (API 26) and above

Forced portrait orientation, prohibits landscape orientation

4. Privacy Compliance (Google Play Listing Standards)
Does not collect any user privacy data

Does not use sensitive permissions such as storage, contacts, and location

Runs offline, no network connection required

VI. Optional Extended Features
Feature Description
Achievement System: Unlock titles by achieving specific goals (e.g., 100 jumps, surviving for 3 minutes)
Leaderboard: Displays global and local top scores (requires internet connection)
Item Support: Adds random items such as "Double Jump" and "Invincibility Shield" for pickup and use
Day/Night Cycle: Automatically switches backgrounds to day/night/dusk based on system time

VII. Screenshots and Schematics (Work in Progress)
Main Menu
Gradient desert background + animated clouds and sun

Pulsating dinosaur in the center + game buttons (Start, Settings, High Score)

Trophy icon displays the highest score

Game End Screen
Dinosaur tearing/falling animation

Clear score comparison (current round / highest)

"Retry" and "Back" buttons

⚙ Settings
Rounded corner pop-up + dynamic sound effect preview

Background theme switching & character skin selection

Live audition button and volume adjustment feedback