Summary: PQ2 is definetly a great improvement for the series. The puzzles are fun, intriguing and the presentation may be simple, but quite clean and effective. It's great that you can play user-created puzzles, create your own and check your score with people around the world.
Summary: This game is VERY challenging. It makes you use brain cells, you didn't even know you had. It can be a bit tricky, and the grade scale for the games is REALLY tough. But if you play the game without worrying about the grading scale, it's really fun in a brain busting, challenging sort of way.
Summary: PQ2 is a great logical game for those who like puzzles. 1. Perfect idea. 2. Great design. 3. Very nice soundtrack. 4. Interactivity: you can apply your score to the Web, create your puzzles, download users' puzzles. This game is a challenge for your brain. The masterpiece of GameDev.
Summary: Not good on graphics. Puzzles are ok not much on the think tank if you know what I mean. Great game if you want something to do on your work breaks if you need something to stay busy but don't want to be thinking about an RPG all day. LOL