Yes, you can. I’m changing the HTML page to hide some options and scale the canvas to almost full-page, just open the HTML and replace the <Body> header with this code:
<body>
<button type="button" class="btn btn-primary" id="fullscreen_request">FullScreen</button>
<span style="color: #d7d7d7; font-size: 1.1rem; font-weight: bold;">Works only with 64Bit browsers : Opera, Chrome, Firefox. Click the game area to lock the mouse. Press ESC key to unlock the mouse. </span>
<style>
body { background-color: #000000; }
#buttonrow { display: none;}
#fullscreen_request { margin: 5px; }
#mainarea { margin: 0px; width: 100%; height: 90% !important; max-width: unset; }
#canvas { width: 100% !important; height: 100% !important; margin: 0px !important; margin-left: unset !important; margin-right: unset !important; }
</style>
<script>
try {
window.setTimeout(function() {
$("body").prepend("<span style=\"color: #d7d7d7; font-size: 1.1rem; font-weight: bold;\">Works only with 64Bit browsers : Opera, Chrome, Firefox. Click the game area to lock the mouse. Press ESC key to unlock the mouse. </span>");
$("body").prepend($("#fullscreen_request"));
}, 100);
} catch(err) { throw "Bad custom script, id 1."; }
</script>
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