Based on the user reviews, here are three cons and three pros of the Color Filling app: **Cons:** 1. Frustrating difficulty curve: Some users found the game too easy at first, but then frustratingly hard later on. 2. Limited level variety: Reviewers mentioned that levels can get repetitive, with too much similarity between them. 3. No reward system: Users expressed disappointment that there is no reward system or incentives to keep them motivated. **Pros:** 1. Simple yet addictive gameplay: Users praised the game's simplicity and how it can be easy to pick up but hard to put down. 2. Beautiful and calming graphics: Reviewers appreciated the app's vibrant colors and soothing atmosphere. 3. Great for relaxation and stress relief: Many users mentioned that the game helps them unwind and relax, making it a great way to de-stress.