Based on the user reviews, here are three cons and three pros, with 15 words or less for each: **Cons:** 1. Users complain about ads intruding on gameplay, feeling obtrusive and annoying. 2. Some users find the learning pace too slow, leading to boredom and frustration. 3. Others report difficulties with navigation and difficulty finding the "next level" button. **Pros:** 1. Many users praise the app's engaging and fun puzzle design, making learning enjoyable. 2. The app's interactive approach to learning Russian alphabet is well-received, with users loving the challenges. 3. Reviewers appreciate the app's progress tracking and rewards system, motivating users to continue learning. Please note that these are general summaries based on the user reviews and may not reflect every individual's experience with the app.