Hmmm... now you&#x27;ve got me wondering. Thing is, on the later levels, I found myself working one property at a time, understanding the effect of that one property, and building up the complete &#x27;answer&#x27;. I&#x27;m not sure that handling the &#x27;wrong answer&#x27; as a special case works for this type of approach. The repetition should (and is, to an extent) be provided by subsequent questions reusing just-learned knowledge.<p>There&#x27;s nothing to stop you starting from the beginning at any point, or starting from scratch at any point in future. It makes it less of a &#x27;game&#x27; but, like I said, I think you&#x27;re overplaying the game element.