The user wants me to build a classic Mario-style platformer game using Phaser.js. The requirements are:

1. Single-page web app in one self-contained file named index.html
2. CSS in <style> tags, JS in <script> tags
3. No external resources, CDNs, or network requests
4. Use phaser.min.js that's already present in the current directory
5. Classic Mario-style gameplay: run, jump, scroll platforms, stomp enemies, collect coins, reach goal flag
6. Use only procedurally generated graphics (no external image/audio assets)

I need to:
1. First check what files are in the current directory to confirm phaser.min.js exists
2. Create index.html with all the game code embedded
3. Build a complete Mario-style platformer with:
   - Player character that can run and jump
   - Scrolling platforms
   - Enemies that can be stomped
   - Coins to collect
   - Goal flag to reach
   - Procedurally generated graphics

Let me start by checking the current directory structure.

Great! The phaser.min.js file is available. Now I need to create a complete Mario-style platformer game in a single index.html file. I'll need to:

1. Create the HTML structure with embedded CSS and JavaScript
2. Use Phaser.js for the game engine
3. Implement:
   - Player character with movement (run, jump)
   - Scrolling platforms
   - Enemies that can be stomped
   - Coins to collect
   - Goal flag
   - Procedurally generated graphics using shapes and colors

Let me build this step by step.

Perfect! I've created a complete Mario-style platformer game in a single index.html file. The game includes:

1. **Player Character**: Red square that can run left/right and jump
2. **Scrolling Platforms**: Brown platforms at different heights
3. **Enemies**: Purple squares that move back and forth (can be stomped)
4. **Coins**: Golden circles that float and give points when collected
5. **Goal Flag**: Red flag to reach to complete the level
6. **UI**: Score and lives display, instructions
7. **Procedural Graphics**: All sprites are generated using Phaser's graphics system with no external assets
8. **Game Mechanics**:
   - Arrow keys for movement
   - Space bar for jumping
   - Stomping enemies gives points and bounces player
   - Collecting coins gives points
   - Losing all lives ends the game
   - Reaching the flag completes the level

The game features proper physics, collision detection, camera following, and a complete level layout. Everything is self-contained in one file as requested.