Based on the reviews of the "Classic Blocks Puzzle Jewel" app, here are three cons and three pros: **Cons:** 1. Some users find the game's difficulty level too high, making it frustrating to progress. 2. A few reviewers experienced glitches and crashes during gameplay, disrupting their experience. 3. Some users criticize the app's lack of customization options, such as different puzzle shapes and sizes. **Pros:** 1. Most users praise the game's classic and addictive gameplay, with many returning to play daily. 2. Reviewers appreciate the app's simple and intuitive interface, making it easy to learn and play. 3. Players enjoy the sense of accomplishment and satisfaction from completing puzzles and achieving milestones. Please note that these conclusions are based on a selection of reviews and may not reflect the opinions of all users.