Love the aesthetics of this game. It looks gorgeous. It is a great game to introduce people to picross and I have recommended it to friends, but I do hope you can "fix" the fade clue option so it can fade out regardless of if you have the correct places as long as you have the same number of solid boxes. Also, it should not fade out if there is nothing to indicate which clue has been identified. For example, if I have (3,3) in a row of ten boxes. If I have identified 3 boxes but I am not sure if they are the first or last 3 in the row, it should not fade out. If the first 3 boxes where at the beginning of the row and it must be the first 3, then it should fade out. I hope this makes sense.
Additionally, would love if you could add undo and redo option.