21 Classic Snake Game

Overview

The Classic Snake Game is a Python-based recreation of the timeless arcade game, built using the turtle graphics library. The objective is simple: control the snake, eat food to grow, and avoid colliding with the walls or your own tail. This project focuses on clean code organization using Object-Oriented Programming (OOP) and modular design principles.

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Concepts Implemented

• Object-Oriented Programming (OOP): Classes like Snake, Food, and Scoreboard encapsulate game logic and promote reusability.
• Modularization: Code is split into multiple files (snake.py, food.py, scoreboard.py, main.py) for better organization.
• Slicing and List Manipulation: Efficient handling of the snake segments as a list for smooth movement and growth.
• Class Inheritance: The Food class inherits from the Turtle class, extending its functionality to manage food appearance and behavior dynamically.
• Persistent High Score Tracking: The highest score achieved is saved in data.txt and loaded when the game starts, ensuring it is retained across sessions.

Game Logic Explained

1. Screen Setup and Snake Creation

• Initializes a game screen (600x600 pixels) with a black background.
• The snake starts with three square segments aligned horizontally.

2. Snake Movement

• The snake moves automatically in its current direction.
• Each segment follows the position of the previous one to simulate smooth movement.
• Movement is continuous and managed through a game loop with screen.update() and time.sleep() for consistent frame rates.

3. Controls

• Movement keys have been updated for a more natural experience:
  • W - Move Up
  • S - Move Down
  • A - Move Left
  • D - Move Right
• The snake cannot reverse directly into itself (e.g., moving from Up directly to Down).

4. Collision Handling & Game State Reset

• Food Collision: Eating food triggers the refresh() method, which randomly places a new food item on the screen.
• Wall Collision: The game no longer ends when the snake collides with a wall. Instead, a new three-segment snake respawns, and the current score resets while keeping the highest score intact.
• Self Collision: If the snake collides with its own body, the game resets the score and respawns a new snake.

5. High Score Persistence

• The game reads and writes the highest score to data.txt.
• If the file does not exist, it defaults to 0.
• After each game session, if a new high score is achieved, it is saved to the file automatically.

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How to Run

1. Clone this repository.
2. Install dependencies:
   • Requires Python 3.x (no additional libraries needed since turtle is included in the standard library).
3. Run the game.

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Acknowledgments

Inspired by classic arcade games and built as part of a Python learning journey through Dr. Angela Yu’s 100 Days of Code: Python Pro Bootcamp.

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