Add touch control for mobile devices

touch-control.js

@@ -0,0 +1,24 @@
+const hammertime = new Hammer(document.getElementById("tetris"));
+
+hammertime.on('swipeleft', () => {
+    keys.left.action();
+});
+
+hammertime.on('swiperight', () => {
+    keys.right.action();
+});
+
+hammertime.on('swipe', (e) => {
+    console.log(e.direction);
+    keys.down.action();
+});
+
+hammertime.on('tap', (e) => {
+    if (e.tapCount >= 2) {
+        keys.rotateRight.action();
+    }
+});
+
+hammertime.on('press', () => {
+    keys.down.action();
+});