Game Load Config

class Example extends Phaser.Scene
{
    preload ()
    {
        this.load.setBaseURL('https://cdn.phaserfiles.com/v385');
        var progress = this.add.graphics();
        this.load.setPath('sprites');
        this.load.on('progress', function (value) {

            progress.clear();
            progress.fillStyle(0xffffff, 1);
            progress.fillRect(0, 270, 800 * value, 60);

        });

        this.load.on('complete', function () {

            progress.destroy();

        });

        //  Now let's load a huge stack of files!

        this.load.image('128x128');
        this.load.image('advanced_wars_tank');
        this.load.image('amiga-cursor');
        this.load.image('aqua_ball');
        this.load.image('arrow');
        this.load.image('asteroids_ship');
        this.load.image('asuna_by_vali233');
        this.load.image('atari130xe');
        this.load.image('atari400');
        this.load.image('atari800');
        this.load.image('atari800xl');
        this.load.image('atari1200xl');
        this.load.image('beball1');
        this.load.image('bikkuriman');
        this.load.image('block');
        this.load.image('blue_ball');
        this.load.image('bluebar');
        this.load.image('bsquadron1');
        this.load.image('bsquadron2');
        this.load.image('bsquadron3');
        this.load.image('budbrain_chick');
        this.load.image('bullet');
        this.load.image('bunny');
        this.load.image('cakewalk');
        this.load.image('car');
        this.load.image('carrot');
        this.load.image('centroid');
        this.load.image('chain');
        this.load.image('chick');
        this.load.image('chunk');
        this.load.image('clown');
        this.load.image('coin');
        this.load.image('cokecan');
        this.load.image('columns-blue');
        this.load.image('columns-orange');
        this.load.image('columns-red');
        this.load.image('copy-that-floppy');
        this.load.image('crate');
        this.load.image('crate32');
        this.load.image('cursor-rotate');
        this.load.image('darkwing_crazy');
        this.load.image('diamond');
        this.load.image('dude');
        this.load.image('eggplant');
        this.load.image('elephant');
        this.load.image('enemy-bullet');
        this.load.image('exocet_spaceman');
        this.load.image('explosion');
        this.load.image('eyes');
        this.load.image('firstaid');
        this.load.image('flectrum');
        this.load.image('flectrum2');
        this.load.image('fork');
        this.load.image('fuji');
        this.load.image('gem');
        this.load.image('ghost');
        this.load.image('green_ball');
        this.load.image('healthbar');
        this.load.image('helix');
        this.load.image('hello');
        this.load.image('hotdog');
        this.load.image('ilkke');
        this.load.image('interference_ball_48x48');
        this.load.image('kirito_by_vali233');
        this.load.image('lemming');
        this.load.image('loop');
        this.load.image('maggot');
        this.load.image('master');
        this.load.image('melon');
        this.load.image('mine');
        this.load.image('mouse_jim_sachs');
        this.load.image('mushroom');
        this.load.image('onion');
        this.load.image('orange-cat1');
        this.load.image('orange-cat2');
        this.load.image('orb-blue');
        this.load.image('orb-green');
        this.load.image('orb-red');
        this.load.image('oz_pov_melting_disk');
        this.load.image('palm-tree-left');
        this.load.image('palm-tree-right');
        this.load.image('pangball');
        this.load.image('parsec');
        this.load.image('pepper');
        this.load.image('phaser');
        this.load.image('phaser-dude');
        this.load.image('phaser-ship');
        this.load.image('phaser_tiny');
        this.load.image('phaser1');
        this.load.image('phaser2');
        this.load.image('pineapple');
        this.load.image('plane');
        this.load.image('platform');
        this.load.image('player');
        this.load.image('purple_ball');
        this.load.image('ra_dont_crack_under_pressure');
        this.load.image('rain');
        this.load.image('red_ball');
        this.load.image('rgblaser');
        this.load.image('saw');
        this.load.image('shinyball');
        this.load.image('ship');
        this.load.image('shmup-baddie');
        this.load.image('shmup-baddie-bullet');
        this.load.image('shmup-baddie2');
        this.load.image('shmup-baddie3');
        this.load.image('shmup-boom');
        this.load.image('shmup-bullet');
        this.load.image('shmup-ship');
        this.load.image('shmup-ship2');
        this.load.image('skull');
        this.load.image('slime');
        this.load.image('slimeeyes');
        this.load.image('snowflake-pixel');
        this.load.image('sonic');
        this.load.image('sonic_havok_sanity');
        this.load.image('space-baddie');
        this.load.image('spaceman');
        this.load.image('spikedball');
        this.load.image('spinObj_01');
        this.load.image('spinObj_02');
        this.load.image('spinObj_03');
        this.load.image('spinObj_04');
        this.load.image('spinObj_05');
        this.load.image('spinObj_06');
        this.load.image('spinObj_07');
        this.load.image('spinObj_08');
        this.load.image('splat');
        this.load.image('steelbox');
        this.load.image('tetrisblock1');
        this.load.image('tetrisblock2');
        this.load.image('tetrisblock3');
        this.load.image('thrust_ship');
        this.load.image('tinycar');
        this.load.image('tomato');
        this.load.image('treasure_trap');
        this.load.image('ufo');
        this.load.image('wabbit');
        this.load.image('wasp');
        this.load.image('wizball');
        this.load.image('x2kship');
        this.load.image('xenon2_bomb');
        this.load.image('xenon2_ship');
        this.load.image('yellow_ball');
        this.load.image('zelda-hearts');
        this.load.image('zelda-life');
    }

    create ()
    {
        const keys = this.textures.getTextureKeys();

        for (let i = 0; i < keys.length; i++)
        {
            const x = Phaser.Math.Between(0, 800);
            const y = Phaser.Math.Between(0, 600);

            this.add.image(x, y, keys[i]);
        }
    }
}

const config = {
    type: Phaser.AUTO,
    width: 800,
    height: 600,
    parent: 'phaser-example',
    loader: {
        baseURL: 'assets'
    },
    scene: Example
};

const game = new Phaser.Game(config);