Things I'd like to see:

1. Display best move, after I've had my attempt.
2. Display best move if I give up.
   My latest game is attached. 
3. A Play Again button.
   Perhaps some of these are supposed to work, but I don't see them.

@lexulous The puzzle no longer hangs. I get the score. But there is no option to play again.

@lexulous A few bugs to iron out yet. Also, what you say about scoring doesn't make sense. If I get the same score as the target, the difference is zero, yet in another game (#15 I think it was) I scored 15 for a 21-point answer.

@Steven-Papier You have to use the 2LW tab and the tools are all together in there.

Love the puzzle. After I played a move, it gave me a score but there was no way to start another puzzle or see the top-scoring answer. It just hung.