Alien Invasion Game

A classic space shooter game built with Pygame. Defend Earth from alien fleets and achieve the highest score!

Installation

Prerequisites

• Python 3.7+
• Pygame 2.1.2+

1. Clone/download the repository
2. Install dependencies:

pip install pygame

How to Play

Running the Game

python alien_invasion.py

Controls

Key	Action
← →	Move spaceship left/right
SPACE	Toggle auto-fire (hold to shoot)
P	Pause/Unpause game
ENTER	Start new game
Q	Quit game (saves high score)

Game Features

• 🚀 Progressive difficulty: Speed increases with each level
• 💥 Explosion effects for alien/ship destruction
• 🔊 Sound effects and background music
• 🌟 Starry animated background
• 🏆 Persistent high score tracking
• ⏸️ Pause functionality

Troubleshooting

1. If sounds don't play:
   • Ensure .wav/.ogg files exist in sounds/
   • Check system volume/mute status
2. If missing images:
   • Verify ship and alien images exist in images/
3. On Linux systems, install SDL dependencies:

sudo apt-get install python3-dev libsdl2-dev libsdl2-image-dev libsdl2-mixer-dev

Destroy alien waves, survive as long as possible, and top the leaderboard! 👾🛸