Fix TODO comments on key bindings

     } else if (keyCode == 76) {                      // l
       history.forward()
     } else if (keyCode == 87) {                      // w
-      // move up (in room)
+      // TODO move up (in room)
     } else if (keyCode == 65) {                      // a
-      // move left (in room)
+      // TODO move left (in room)
     } else if (keyCode == 83) {                      // s
-      // move down (in room)
+      // TODO move down (in room)
     } else if (keyCode == 68) {                      // d
-      // move right (in room)
+      // TODO move right (in room)
     }
   }, false)
 }