The Easy level is great for kids but the Expert level is hard for gamers to beat. If you make a mistake or want to change your strategy, Four Discs lets you undo any of your moves. Compare your score with your friends or the rest of the world with built-in Game Center leaderboards. MAIN FEATURES • Select between four levels of difficulty: Easy, Medium, Hard and Expert • Game that is suitable for everyone from kids to adults • Play against the computer or with another friend on the same device • Lets you undo any of your moves if you make a mistake • Compare your scores with your friends or the world with Game Center • Turn sound effects On or Off • Universal App, full native support for iPad, iPhone and iPod touch