Based on the users' reviews of the Jewel Block Puzzle 2020 app, here are the conclusions: **Pros:** 1. Engaging gameplay with increasing challenge and excitement, keeping users hooked. 2. Beautiful and colorful graphics make the game visually appealing and enjoyable. 3. Simple yet addictive mechanics allow players of all ages to participate and have fun. **Cons:** 1. In-app purchases and ads interrupt the gameplay experience, annoying some users. 2. Limited level variety and repetitive gameplay can lead to boredom and frustration. 3. Some users complain about the app's lack of customization options and features. Please note that the conclusions are based on the reviews available on the App Store at the time of my knowledge cutoff, and the opinions may change over time.