add touch events

index.html

@@ -139,7 +139,7 @@
     ['mousemove', 'touchstart', 'touchmove'].forEach(type => {
        window.addEventListener(type, event => {
            document.getElementById('cursor').style.top = (event.clientY || event.touches[0].clientY) + 'px';
-           document.getElementById('cursor').style.left = (event.clientY || event.touches[0].clientY) + 'px';
+           document.getElementById('cursor').style.left = (event.clientX || event.touches[0].clientX) + 'px';
        });
     });