I only played through the first 3 levels but that's because I personally didn't enjoy the game enough to keep going. Don't get me wrong its not a bad game in the slightest i'm just not a particular fan of these type of logic-based puzzles, hence why I got it for free and I didn't buy it.. However if you do like difficult, logic-based puzzles then this game is a great buy, the soundtrack is really good regardless and the graphics are really nice to look at.