make stage non-transparent for performance reasons?

visualization/static/visualization/GameVisualization.js

@@ -24,7 +24,7 @@ function GameVisualization(assets, snakeMoveStrategy, container)
         [ 0xFF0000, 0xFF0000, 0xFF0000, 0xFF0000, 0xFF0000, 0xFF0000, 0xFF0000, 0xFF0000, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF,  ],
     ];
 
-    this.app = new PIXI.Application({'transparent':true});
+    this.app = new PIXI.Application({'transparent':false});
     this.app.stage.interactiveChildren = false;
 
     this.txHead = PIXI.Texture.fromImage(assets['head.png']);

visualization/static/visualization/Snake.js

@@ -190,6 +190,6 @@ Snake.prototype.AnimateEat = function()
         let factor = (dist-food.speed) / dist;
         food.x = x + dx*factor;
         food.y = y + dy*factor;
-        food.speed *= 1.2;
+        food.speed *= 1.3;
     }
 };
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