Based on the users' reviews of the "Pen Run" app, here are three cons and pros: **Cons:** 1. Some users found the game's controls unresponsive and frustrating. 2. Limited level variety and repetitive gameplay were common complaints. 3. Ads are intrusive and disrupt the gaming experience. **Pros:** 1. Users praised the game's colorful and vibrant graphics. 2. The game's simple yet addictive gameplay appeals to many players. 3. The app's regular updates with new levels and features keep players engaged.