Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Buy it for Puzzle Mode

First of all, I agree with the comments of the other reviewers about Classic mode. I was very distracted by the changing background and the "single, double, triple, TETRIS" graphics. But after playing my Game Boy Tetris DX game to death, I wanted to see what other Tetris options were available. So after hating Classic mode, I decided to try Puzzle mode. And 3 hours later, I was still trying Puzzle mode! Seriously, these little puzzles with the professor guy trying to get to the bottom of the screen ROCK. You start with really easy puzzles (of course) that only take a few seconds/moves to clear. Then the real fun begins. This game will turn your brain inside out. I made it to level 17 during my first session and could have kept on playing for hours longer ("Just one more try."). If you enjoy strategy/puzzle games and are a little bored with "regular" Tetris, this will be right up your alley.