Updates to Rain and added tracks

index.html

@@ -467,6 +467,10 @@
         'music/track02.mp3',
         'music/track03.mp3',
         'music/track04.mp3',
+        'music/track05.mp3',
+        'music/track06.mp3',
+        'music/track07.mp3',
+        'music/track08.mp3',
     ];
 
     let currentTrackIndex = 0;
@@ -811,7 +815,11 @@
     function rainLoop() {
         if (!rainRunning) return;          // stop when game ends
 
-        rainCtx.clearRect(0, 0, rainCanvas.width, rainCanvas.height);
+        rainCtx.globalCompositeOperation = 'destination-out';
+        rainCtx.fillStyle = 'rgba(0,0,0,0.05)';   // 5 % fade each frame
+        rainCtx.fillRect(0, 0, rainCanvas.width, rainCanvas.height);
+        // Switch back to normal drawing mode for the rain characters
+        rainCtx.globalCompositeOperation = 'source-over';
 
         // Update & draw each drop
         rainDrops.forEach(drop => {