The user wants me to build a Mario-style side-scrolling platformer game using Phaser. Let me plan out what I need to include:

1. **Core Game Mechanics:**
   - Player character that can run left/right and jump
   - Side-scrolling camera that follows the player
   - Platforms to jump on
   - Enemies that can be stomped
   - Coins to collect
   - A goal flag to reach

2. **Procedural Graphics:**
   - Since I can't use external assets, I'll need to use Phaser's Graphics API to draw everything
   - Player: simple rectangle or composite shape
   - Platforms: colored rectangles
   - Enemies: simple shapes (maybe with some animation)
   - Coins: circles
   - Flag: simple pole and banner
   - Background: gradient or simple pattern

3. **Game Structure:**
   - Main menu scene
   - Game scene
   - Game over/win scene

4. **Physics:**
   - Use Phaser's arcade physics
   - Collision detection between player and platforms, enemies, coins, flag

5. **Level Design:**
   - Procedurally generate a level with platforms at various heights
   - Place enemies and coins throughout
   - Add a goal at the end

Let me create this comprehensive game in a single index.html file.

The user wants me to build a Mario-style side-scrolling platformer game using Phaser, with all graphics procedurally generated. Let me create a complete, self-contained HTML file with:

1. CSS styles in a <style> tag
2. JavaScript game logic in a <script> tag
3. Use the pre-loaded phaser.min.js
4. Procedurally generated graphics (no external assets)
5. Features: running, jumping, scrolling platforms, stomping enemies, collecting coins, goal flag

Let me design this game:

**Game Elements:**
- Player character (procedurally drawn sprite)
- Platforms (ground, floating platforms)
- Enemies (goombas-style that can be stomped)
- Coins (collectible)
- Goal flag (to win the level)

**Gameplay:**
- Arrow keys or WASD for movement
- Space or up arrow for jump
- Side-scrolling camera
- Collision detection
- Score tracking
- Win/lose conditions

Let me write this complete game:

I've created a complete Mario-style side-scrolling platformer game. Let me verify the file was created properly and check that it includes all the requested features.