Add The Some Feature in OpenSudoku

Components

Open Sudoku is a simple open source sudoku game. It's designed to be controlled both by finger and keyboard. It's preloaded with 90 puzzles in 3 difficulty levels, more puzzles can be downloaded from the web and it also allows you to enter your own puzzles.

Proposal

I want to add a new level that is the highest level when playing, Super Hard level.

Mockups / Examples

Before added the feature.

After added the feature maybe look like this.

Benefits

The advantage of this feature is the more intense and increasingly difficult sudoku game, this is the highest level of the Open Sudoku game.