Fix width and height

src/frontend/game.js

@@ -21,8 +21,8 @@ class Game extends Phaser.Game {
   constructor(backend) {
     let config = {
       type: Phaser.AUTO,
-      width: window.innerWidth * window.devicePixelRatio,
-      height: window.innerHeight * window.devicePixelRatio,
+      width: window.innerWidth,
+      height: window.innerHeight,
       scene: TestScene,
     };