Folder structure

assets/Scripts/Menu/Menu.ts

@@ -1,10 +1,11 @@
 import { _decorator, Component, Node } from "cc";
+
 import { GameRunner } from "./GameRunner";
 const { ccclass, property } = _decorator;
 
 @ccclass("Menu")
 export class Menu extends Component {
-    public start(): void {
+    public async start(): Promise<void> {
         GameRunner.Instance.playGame();
     }
 }