adding 502 error

games/pacman502/js/game.js

@@ -0,0 +1,21 @@
+// The main game loop
+var main = function () {
+	var now = Date.now();
+	var delta = now - then;
+
+	update(delta / 1000);
+	render();
+
+	then = now;
+
+	// Request to do this again ASAP
+	requestAnimationFrame(main);
+};
+
+// Cross-browser support for requestAnimationFrame
+var w = window;
+requestAnimationFrame = w.requestAnimationFrame || w.webkitRequestAnimationFrame || w.msRequestAnimationFrame || w.mozRequestAnimationFrame;
+
+// Let's play this game!
+var then = Date.now();
+main();