NussKnacker is a sophisticated Jawbreaker clone.
NussKnacker presents the following features: - Four built-in shapes, one of whom customizable (by editing ballx.bmp)
- Four board-sizes, one of whom customizable
- Three levels of difficulty
- Redo feature
- Replay Game feature
- Ability to save and restore a game
- Save scores
- Ability to change the scoring mode

Very addictive Jawbreaker clone for Windows, will keep you entertained for a long time. Remove marbles by their color. But you do need to use some strategy.