Sure! Here's a minimal example of a 1024x1024 window using the phaser.js library:

```js
const config = {
    type: Phaser.AUTO,
    width: 800,
    height: 600,
    backgroundColor: '#2d2d2d',
    parent: 'phaser-example',
    scene: [ ]
};

const game = new Phaser.Game(config);
```
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