Unless I am misinterpreting your example?
You certainly do, but it's my fault. I asumed you will realize, that you have to apply the same image to ths sprite "boxDropped". I did not do it, so that you could easily see, how I archived the tricky goal of the scoring....
The challange is, that you have to be able to handle the two instances, ie. the dropping box and the target box. To do this, I used two different sprites and replaced the "Box" sprite with the "boxDroppes" sprite as soon as the dropped box lays still....