Based on the users' reviews of the Merge Stack app, here are the conclusions: **Pros:** 1. Innovative concept: Users praise the app's unique way of combining puzzle games and stacking mechanics. "Refreshing take on puzzle games!" 2. Addictive gameplay: Many users can't stop playing, recommending the app for its engaging and challenging levels. "Can't put the app down, addictively fun!" 3. Smooth graphics: Most users appreciate the app's clean and vibrant visuals, making it a pleasure to play. "Beautiful graphics, easy on the eyes!" **Cons:** 1. Limited levels: Some users feel the game is too short, with too few levels, leaving them wanting more. "Too short, needs more levels!" 2. Glitches and bugs: A few users have experienced glitches and bugs, which can be frustrating and ruin the experience. "Glitches and crashes, affect game performance!" 3. In-app purchases: A few users are unhappy with the app's in-app purchase model, feeling it's overpriced or not worth the cost. "In-app purchases are too expensive!"