Sand Block Color is a casual puzzle game that blends traditional grid-based logic with a proprietary fluid physics engine. By allowing puzzle pieces to dissolve into flowing, stacking sand, the developer has created a "zen" experience that targets users seeking stress relief and cognitive stimulation. While the core gameplay is highly praised for its therapeutic qualities, the product is currently facing significant retention challenges. The developer’s aggressive monetization strategy—specifically the implementation of intrusive mid-level advertisements—is actively undermining the user experience and causing a decline in sentiment.