The widget is still under development, however You can use the widget on your website. All you need to do is copy the code below and paste it in the selected place on your website.
<iframe width="100%" src="https://dx.wojtekjakiela.pl/widget.php" sandbox="allow-same-origin allow-popups allow-popups-to-escape-sandbox" onload="this.style.height=(this.contentWindow.document.body.scrollHeight+60)+'px';"></iframe>