Add game over mechanic - dangerous squares now end the game

- Entering any dangerous square (visual or audio) now ends the game
- Added game over sound effect with descending melody
- Game over triggers restart from beginning
- Updated UI messages to reflect deadly nature of dangers
- Enhanced challenge: no second chances, must complete without touching dangers
- Updated documentation to reflect new high-stakes gameplay

README.md

@@ -1,14 +1,15 @@
 # Danger Field Game
 
-A browser-based danger field game where players navigate through an open area filled with hidden and visible dangers. The game provides multiple types of feedback to enhance the gaming experience.
+A challenging browser-based danger field game where players must navigate through a deadly minefield using visual and audio cues. One wrong step ends the game!
 
 ## Features
 
 ### Core Gameplay
 - **Player Movement**: Navigate using WASD keys or arrow keys
-- **Open Field**: No internal walls - only outer boundary is impassable
-- **Mixed Dangers**: Scattered visual and audio danger squares throughout the field
-- **Goal**: Reach the exit (🏁) while avoiding various types of dangers
+- **Open Minefield**: No internal walls - only outer boundary is impassable
+- **Deadly Dangers**: Both visual and hidden dangers end the game instantly
+- **High Stakes**: Navigate carefully - there are no second chances!
+- **Goal**: Reach the exit (🏁) without touching any dangerous squares
 
 ### Feedback Systems
 - **Visual Feedback**: 
@@ -28,9 +29,8 @@ A browser-based danger field game where players navigate through an open area fi
   - Built with Web Audio API with stereo panning and pitch modulation
 
 - **Haptic Feedback**: 
-  - **Visual danger**: Quick double vibration (no audio)
-  - **Audio danger**: Long vibration pattern with audio
-  - **Victory**: Celebration vibration pattern
+  - **Game Over**: Strong vibration pattern when touching dangerous squares
+  - **Victory**: Celebration vibration pattern when reaching the exit
   - Toggle on/off functionality
 
 ### Technical Features
@@ -68,15 +68,16 @@ npm run build
 ## How to Play
 
 1. **Movement**: Use WASD keys or arrow keys to move your character (green circle)
-2. **Visual Dangers**: Red animated squares are dangerous - avoid them for safety
-3. **Hidden Audio Dangers**: Some white squares look safe but are dangerous
+2. **Avoid All Dangers**: Both red squares and hidden audio dangers are **deadly**!
+3. **Game Over**: Stepping on any dangerous square ends the game immediately
 4. **Directional Audio Cues**: 
    - **Left/Right panning**: Sound comes from the side where hidden dangers are located
    - **Pitch variation**: Higher pitch for dangers above, lower pitch for dangers below
-   - **Rhythmic patterns**: Different timing patterns indicate direction
+   - **Proximity warnings**: Listen carefully to avoid hidden dangers
 5. **Open Navigation**: Move freely through the field - only the outer boundary blocks you
 6. **Find the Exit**: Navigate to the green flag (🏁) to complete the level
-7. **Headphone Recommended**: Use headphones or good speakers for optimal directional audio experience
+7. **Challenge**: Complete the field without touching any dangerous squares!
+8. **Headphone Recommended**: Use headphones or good speakers for optimal directional audio experience
 
 ## Game Controls
 

index.html

@@ -12,8 +12,8 @@
         <h1>Danger Field Game</h1>
         <div class="game-info">
           <p>Use WASD or Arrow Keys to move</p>
-          <p class="visual-warning">⚠️ Red squares are visually dangerous!</p>
-          <p class="audio-warning">🔊 Listen carefully - directional audio warns of hidden dangers!</p>
+          <p class="visual-warning">⚠️ Red squares are deadly - avoid them!</p>
+          <p class="audio-warning">🔊 Hidden dangers end the game - listen carefully!</p>
           <p class="audio-hint">🎧 Use headphones for best directional audio experience</p>
         </div>
         <canvas id="gameCanvas" width="800" height="600"></canvas>

src/audio.js

@@ -181,6 +181,24 @@ export class AudioSystem {
     }, 200);
   }
   
+  async playGameOverSound() {
+    await this.ensureAudioContext();
+    
+    // Create a descending game over sound
+    const notes = [330, 294, 262, 220]; // E, D, C, A (descending)
+    
+    notes.forEach((frequency, index) => {
+      setTimeout(() => {
+        this.createOscillator(frequency, 'sawtooth', 0.5);
+      }, index * 150);
+    });
+    
+    // Add a final low note
+    setTimeout(() => {
+      this.createOscillator(147, 'square', 1.0); // Low D
+    }, 600);
+  }
+  
   playMoveSound() {
     if (!this.initialized) return;
     

src/game.js

@@ -80,21 +80,28 @@ export class Game {
   }
   
   handleVisualDanger() {
-    // Visual danger squares only provide vibration feedback (no audio)
-    if (this.vibrationEnabled && navigator.vibrate) {
-      navigator.vibrate([150, 50, 150]); // Quick double vibration
-    }
+    // Visual danger squares end the game
+    this.gameOver();
   }
   
   handleAudioDanger() {
-    // Audio danger squares provide both sound and vibration
+    // Audio danger squares end the game
+    this.gameOver();
+  }
+  
+  gameOver() {
     if (this.soundEnabled) {
-      this.audioSystem.playDangerSound();
+      this.audioSystem.playGameOverSound();
     }
     
     if (this.vibrationEnabled && navigator.vibrate) {
-      navigator.vibrate([200, 100, 200]); // Pattern: vibrate-pause-vibrate
+      navigator.vibrate([300, 100, 300, 100, 300]); // Game over vibration pattern
     }
+    
+    setTimeout(() => {
+      alert('Game Over! You stepped on a dangerous square.\nReturning to start...');
+      this.resetGame();
+    }, 500);
   }
   
   handleWin() {
@@ -107,7 +114,7 @@ export class Game {
     }
     
     setTimeout(() => {
-      alert('Congratulations! You completed the labyrinth!');
+      alert('🎉 Congratulations! You survived the danger field!\nGenerating new challenge...');
       this.resetGame();
     }, 500);
   }