_Aliens/assets/module_aliens/Script/LevelAction.ts

import { _decorator, BoxCollider2D, Button, CircleCollider2D, Collider2D, Component, find, Node, NodeEventType } from 'cc';

const { ccclass, property } = _decorator;

@ccclass('LevelAction')
export class LevelAction extends Component {

    start() {

    }
}