问带es6类的Phaser3

EN

class Pcu extends Phaser.Scene {
    constructor() {
        super({key: 'Create',active: true});
        this.bla = 0
    }

    preload() {}

    create() {
        this.bla = 1
    }
}

module.exports = Pcu

const Phaser = require('phaser')
const Pcu = require('./scenes/Pcu')

class Main extends Phaser.Game {
    constructor() {
        super({
            type: Phaser.AUTO,
        })
        this.scene.add('Pcu', new Pcu(), false);
        this.aa = new Pcu()
    }

    blabla() {
        console.log(this.aa.bla)
    }
}
module.exports = Main