I need to create a single-page web app that implements a Wolfenstein 3D-style raycasting maze shooter. This is a classic 3D rendering technique that was used in early FPS games. Let me plan out what I need:

1. **HTML Structure**: A canvas element for rendering, and UI elements for health, ammo, score, etc.

2. **CSS**: Styling for the game interface, retro FPS style

3. **JavaScript**:
   - **Raycasting Engine**: Cast rays from player position to render walls
   - **Map System**: A grid-based maze
   - **Player**: Position, direction, movement (WASD), rotation (arrows/mouse)
   - **Enemies**: Simple sprites that move towards player
   - **Shooting**: Raycast-based shooting with ammo system
   - **Procedural Textures**: Generate textures programmatically (brick patterns, etc.)
   - **Game Loop**: Update and render

Key components:

**Raycasting Algorithm**:
- For each column of the screen, cast a ray at a specific angle
- Find where the ray hits a wall
- Calculate distance and draw a vertical line with appropriate height
- Apply simple shading based on distance

**Procedural Textures**:
- Create canvas-based textures with patterns (bricks, stone, etc.)
- Use noise

The user wants me to build a first-person raycasting maze shooter in the style of Wolfenstein 3D. This needs to be a single HTML file with:

1. Raycasting engine for 3D rendering
2. WASD movement
3. Arrow or mouse turning
4. Textured grid maze (procedural textures, no external assets)
5. Enemies to shoot
6. All self-contained in one index.html file

Let me plan this out:

1. **Raycasting Engine**: 
   - Cast rays from player position
   - Calculate wall distances
   - Draw vertical strips with proper height based on distance
   - Apply texture mapping

2. **Procedural Textures**:
   - Create canvas-based textures programmatically
   - Different wall types with patterns
   - Floor and ceiling textures

3. **Maze Generation**:
   - Grid-based map
   - Could be procedural or predefined

4. **Player Movement**:
   - WASD for movement
   - Arrow keys or mouse for rotation
   - Collision detection with walls

5. **Enemies**:
   - Simple sprite-based enemies
   - Basic AI (move toward player)
   - Shooting mechanics
   - Health system

6. **Game Loop**:
   - Update player position
   - Update enemies
   - Render scene

Let me

The user wants me to build a Wolfenstein 3D-style raycasting maze shooter as a single HTML file. This is a complex project that needs:

1. **Raycasting engine** - 3D rendering from 2D map using raycasting technique
2. **Player movement** - WASD for movement, arrow keys or mouse for turning
3. **Maze generation** - Procedurally generated maze
4. **Enemies** - Simple enemies that can be shot
5. **Procedural textures** - No external assets, so I need to generate textures programmatically
6. **Shooting mechanics** - Weapon and shooting system

The user wants me to build a first-person raycasting maze shooter in the style of Wolfenstein 3D. This needs to be a single HTML file with:

1. Raycasting engine for 3D-like rendering
2. WASD movement
3. Arrow key or mouse turning
4. Textured maze walls
5. Enemies to shoot
6. Procedural textures (no external assets)

Let me plan this out:

1. **Raycasting Engine**:
   - Cast rays from player position in a circle
   - For each ray, find distance to wall
   - Draw vertical strip based on distance (closer = taller)

2. **Maze Generation**:
   - Create a grid-based maze
   - Use procedural generation (recursive backtracking or similar)

3. **Player**:
   - Position (x, y)
   - Direction (angle)
   - Movement with WASD
   - Turning with arrow keys or mouse

4. **Textures**:
   - Generate wall textures procedurally (brick patterns, etc.)
   - Generate enemy sprites procedurally

5. **Enemies**:
   - Simple sprites that face the player
   - Basic AI (move toward player)
   - Health system
   - Can be shot

6. **Shooting**:
   - Click to shoot
   - Raycast to check if enemy is in crosshair
   - Visual feedback (muzzle flash, hit effect)

Let me write this complete implementation:

I've created a complete Wolfenstein 3D-style raycasting maze shooter. Let me summarize what I built:

1. **Raycasting Engine**: Casts 320 rays from the player's position to render walls with proper perspective and texture mapping
2. **Procedural Maze Generation**: Uses recursive backtracking to generate a random maze with some extra openings for gameplay
3. **Procedural Textures**: Creates brick/stone wall textures using canvas drawing operations (no external assets)
4. **Player Controls**: 
   - WASD for movement
   - Arrow keys for turning
   - Mouse look with pointer lock
   - Click to shoot
5. **Enemies**: Procedurally generated enemy sprites that:
   - Move toward the player
   - Can be shot
   - Have health bars
   - Shoot back at the player
6. **HUD**: Shows health, ammo, and score
7. **Minimap**: Shows the maze layout, player position/direction, and enemy positions
8. **Visual effects**: Weapon bobbing, muzzle flash, distance-based shading

The game is fully self-contained in a single HTML file with no external dependencies.