Great idea and execution, love it. Perhaps you mentioned it in the opening message and I just missed it, but...I was waiting for objects to appear that were or

Great idea and execution, love it. Perhaps you mentioned it in the opening message and I just missed it, but...I was waiting for objects to appear that were oriented differently, and only by accident did I realize that I had to tap to rotate (I had first tried by actually doing a rotation gesture). I'd add some note about this on the object palette in the bottom, and maybe even add a rotation gesture to turn it.