added Flappy Bird game

Author: sambit221

Diff for: PyGamesScripts/Flappy Bird/Images/background.png

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+# Flappy Bird
+Flappy Bird Game is a desktop application i.e, developed in python programming language using pygame module.
+
+## About the game
+- It is single player only i.e. you play with computer.
+- You have to keep the bird moving forward and avoid the contact with the obstacles.
+
+## How to Play?
+- You have to remain in the screen until long green channels show up before you.
+-  The user needs to control the bird fluttering up, down  using the Spacebar or mouse clicks. 
+- Avoid the contacts with the pipes to score more.
+- As long as you be alive more will be your score.
+
+
+## Setup instructions
+1. Install Python 3.x (recommended) from <a href="https://www.python.org/downloads/">here</a>
+2. Install Pygame 2.x(recommended) from <a href="https://pypi.org/project/pygame/">here</a>
+3. Download this repository as zip and extract.
+4. open cmd prompt and adjust the directory to 'Flappy Bird' folder.
+5. type this command to run the code<br>
+```bash
+flappy_bird.py
+```
+6. Press Enter to run the code and start playing.<br>
+7. Have fun!!
+
+
+## Output
+<img align="center" alt="output"  src="Images/output.png" />
+
+## Author
+<a href="https://github.com/sambit221">Sambit Kumar Tripathy</a>