<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
	<title>Retro Snaker</title>
	<style type="text/css">
		* {
			margin: 0;
			border: 0;
			padding: 0;
		}
		body {
			display: flex;
			flex-flow: row;
			align-items: center;
			justify-content: center;
			width: 100vw;
			height: 100vh;
			background-color: #333;
		}
		#canvas {
			background-color: #000;
		}
	</style>
</head>
<body>
	<canvas id="canvas"></canvas>
	<script type="text/javascript" src="js/RetroSnaker.js"></script>
	<script type="text/javascript">
		Game.addons("Game-init", function() {
			console.log("Yes!");
		});
		Game.init("canvas", 1000, 600);
	</script>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
	<title>Retro Snaker</title>
	<style type="text/css">
		* {
			margin: 0;
			border: 0;
			padding: 0;
		}

		body {
			display: flex;
			flex-flow: row;
			align-items: center;
			justify-content: center;
			width: 100vw;
			height: 100vh;
			background-color: #333;
		}
		#canvas {
			background-color: #000;
		}
	</style>
</head>
<body>
	<canvas id="canvas"></canvas>
	<script type="text/javascript" src="js/RetroSnaker.js"></script>
	<script type="text/javascript">
		Game.addons("Game-init", function(obj) {
			console.log(obj);
		});
		Game.init("canvas", 1000, 600, "normal");
	</script>
</body>
</html>

Add difficulty changes in the Game setting
Add difficulty changes in the Game setting