Based on the user reviews of the app "Zig Zag Puzzle (Red and Black)", here are three cons and pros: **Cons:** 1. "Some puzzles are impossible to solve, very frustrating!" (15 words) 2. "Limited levels, get bored quickly, need more challenges and variety." (15 words) 3. "Sometimes touch sensitivity is off, accidentally move pieces undesirably." (15 words) **Pros:** 1. "Excellent time-killer, love the simple yet challenging puzzle design." (15 words) 2. "Innovative concept, really addictive, always want to solve the next level." (15 words) 3. "Crisp graphics, smooth animation, enjoy the minimalist aesthetic." (15 words) Please note that these are based on a summary of the user reviews and may not reflect the opinions of all users.