update: add a physic scenne

src/stateManager/AudioManager.ts

@@ -0,0 +1,23 @@
+export class AudioManager {
+  private static _instance: AudioManager | null = null;
+
+  static getInstance(): AudioManager {
+    if (!AudioManager._instance) {
+      AudioManager._instance = new AudioManager();
+    }
+
+    return AudioManager._instance;
+  }
+
+  private constructor() {}
+
+  playSound(path: string, volume = 1): void {
+    const audio = new Audio(path);
+    audio.volume = Math.max(0, Math.min(1, volume));
+    void audio.play();
+  }
+
+  destroy(): void {
+    AudioManager._instance = null;
+  }
+}