The user wants me to create a single-page web app that is a top-down alien shooter game using Phaser (the phaser.min.js file that's already present). The game should:
1. Move with WASD
2. Aim and fire at waves of advancing aliens
3. Include health, score, and increasing difficulty
4. Use ONLY procedurally generated graphics (no external image or audio assets)
5. Be fully self-contained in index.html (CSS in <style>, JS in <script>)

Let me first check if phaser.min.js is actually present in the current directory.

I'll build a top-down alien shooter using Phaser with procedural graphics. Let me first check if phaser.min.js is present, then create the complete game in index.html.

Great, phaser.min.js is present. Now I'll create a complete index.html file with:
- CSS in a <style> tag
- Phaser game logic in a <script> tag
- Load the phaser.min.js file locally
- Use procedural graphics only (no external assets)
- Top-down alien shooter with:
  - WASD movement
  - Mouse aiming
  - Shooting mechanics
  - Waves of advancing aliens
  - Health and score
  - Increasing difficulty

Let me build a complete, polished game with:
1. Player ship (procedurally drawn)
2. Alien enemies (procedurally drawn)
3. Bullets
4. Health bar and score display
5. Wave system with increasing difficulty
6. Particle effects
7. Sound effects (using Web Audio API)
8. Main menu and game over screens

Now I'll create the complete top-down alien shooter game with procedural graphics:

The file has been created successfully. Let me verify the file exists and provide some information about the game.

The alien shooter game has been created in `index.html`. Here's what it includes: **Game Features:** - **Procedural graphics only** - All sprites (player ship, aliens, bullets, powerups) are drawn with Phaser's graphics API - **Controls**: WASD movement, mouse aim, click/tap to shoot - **Wave system**: Increasing difficulty with more aliens and faster movement - **Health system**: Player starts with 100 HP, aliens damage on collision - **Score tracking**: Points increase with wave multiplier - **Powerups**: Random health pickups (20 HP) - **Sound effects**: Generated with Web Audio API (synth sounds) - **Visual effects**: Particle explosions, camera shake, starfield parallax **Game Mechanics:** - Player ship rotates to follow mouse - Different alien types (circles, squares, triangles) - Aliens bounce off walls and shoot red projectiles - Aliens speed up when close to player - Fire rate mechanics and cooldowns The game is fully self-contained in a single HTML file with no external dependencies beyond the included `phaser.min.js`. Simply open `index.html` in a browser to play.