No, this is intended. Closing and reopening the game will give you a new board, but if you would like to pick a new difficulty, you will have to complete a game on the difficulty you first chose. After that, you can switch to a new difficulty.
No, this is intended. Closing and reopening the game will give you a new board, but if you would like to pick a new difficulty, you will have to complete a game on the difficulty you first chose. After that, you can switch to a new difficulty.