The user wants me to build a top-down alien shooter game using Phaser. The requirements are:
1. Single-page web app in one file: index.html
2. CSS in <style> tag, JS in <script> tag
3. No external resources or network requests
4. Use the provided phaser.min.js file
5. WASD movement
6. Aim and fire at aliens
7. Waves of advancing aliens
8. Health, score, and increasing difficulty
9. Only procedurally generated graphics (no external images/audio)

I need to:
1. First check what files are in the current directory
2. Read the phaser.min.js to understand how to use it
3. Create the index.html file with all the game logic

Let me start by checking the current directory and the phaser.min.js file.

Let me use bash to list the directory contents instead.

Good, I can see the phaser.min.js file is present. Now let me create the index.html file with the complete alien shooter game. I'll need to include:

1. HTML structure with canvas for Phaser
2. CSS styling in a style tag
3. JavaScript game logic in a script tag
4. Use phaser.min.js as specified
5. Create procedurally generated graphics for player, aliens, bullets
6. WASD movement controls
7. Mouse aiming and shooting
8. Wave system with increasing difficulty
9. Health and score system

Let me build this step by step in the index.html file.

Perfect! I've created a complete top-down alien shooter game in a single index.html file. The game includes:

1. **Complete HTML structure** with game container, canvas, and UI elements
2. **CSS styling** for a retro game look with health, score, and wave displays
3. **Full Phaser.js game logic** using the provided phaser.min.js file
4. **Procedurally generated graphics**:
   - Player: Green triangle
   - Aliens: Red hexagons  
   - Bullets: Yellow circles
   - Explosions: Orange circles
5. **WASD movement controls** for the player
6. **Mouse aiming** (player rotation follows mouse)
7. **Mouse click shooting** with fire rate limiting
8. **Wave system** with increasing difficulty:
   - More aliens per wave
   - Faster alien movement
9. **Health system** - player takes damage from alien collisions and aliens reaching bottom
10. **Score system** - points for destroying aliens
11. **Game over screen** with restart functionality
12. **Collision detection** between bullets/aliens and player/aliens

The game is completely self-contained with no external dependencies beyond the provided phaser.min.js file. It runs fully sandboxed with no network requests.