Small request to Richard

Hello
when "building" a move, would it be possible to click not only on grey cells, but also on the colored pieces just put, and make them disappear? It would fasten a lot the process of thinking and building a piece on the board...
Because moves in polymino request a lot of page refreshes, and if you go wrong with the move you have to start back again, in this way you would just progress building a different piece.

thank you.