Based on the users' reviews of the Swallow Balls Puzzle app, I've identified the following pros and cons:
1Engaging gameplay with increasing difficulty levels kept users entertained.
2Many praised the game's unique concept and originality, setting it apart.
3The app's visuals and animations were commended for being colorful and visually appealing.
1Some users felt the game's ads were intrusive and annoying, disrupting play.
2Others criticized the game's repetitive sound effects, which became grating.
3A few reviewers reported experiencing issues with the game's lag and glitches.

Please note that these are summaries of the pros and cons based on user reviews and may not reflect the opinions of every user of the app.