little changes

src/pages/tracing/tracing3.astro

@@ -21,7 +21,11 @@ const config = {
     type: Phaser.AUTO,
     width: window.innerWidth,
     height: window.innerHeight,
-  backgroundColor: 0xffffff,
+    backgroundColor: 0xFFFFFF,
+    scale: {
+      mode: Phaser.Scale.FIT,
+      autoCenter: Phaser.Scale.CENTER_HORIZONTALLY,
+    },
     scene: {
       preload: preload,
       create: create,