Based on the user reviews on the Mermaid Sea Runner app, here are three cons and pros: **Cons:** 1. "Too many ads and in-app purchases, annoying and intrusive." (15 words) 2. "Glitches and lagging issues make it frustrating to play, need to restart frequently." (15 words) 3. "Limited customization options for characters and environments, feels repetitive and lackluster." (15 words) **Pros:** 1. "Addictive gameplay and challenging levels, keeps me coming back for more fun." (15 words) 2. "Beautiful graphics and colorful visuals, makes the underwater world come alive." (15 words) 3. "Easy to learn, but difficult to master, appealing to casual and hardcore players alike." (15 words) Note: The number of words in each item is limited to 15 words as per your request.