Based on the reviews, here are three pros and cons of the Hayai Reaction Game app: **Pros:** 1. **Engaging gameplay**: Users love the fast-paced and addictive gameplay that tests their reaction speed and accuracy. 2. **Simple yet challenging**: The game's simple mechanics are easy to learn, but the increasing difficulty level keeps players engaged and challenged. 3. **Good time-killer**: Users appreciate the game's ability to quickly fill short waiting times or provide a fun distraction during breaks. **Cons:** 1. **Too short levels**: Some users find the levels too short, leading to a sense of frustration and a desire for longer, more substantial gameplay experiences. 2. **Too many ads**: A few users are irritated by the numerous ads that interrupt gameplay and disrupt their experience. 3. **Limited features**: Some players feel that the game lacks additional features, such as leaderboards, multiplayer modes, or rewarding achievements. Please note that these points are based on a limited sample of reviews and may not reflect the full range of opinions on the app.