What's a good Android puzzle game that's easy to pick up for short breaks but has satisfying depth?

Block Blitz is a puzzle game that successfully bridges the gap between casual accessibility and engaging depth. The core gameplay involves matching adjacent gems of the same color to clear blocks on a grid, a familiar mechanic that requires minimal learning. Where it distinguishes itself is in the strategic layer of block management; players must clear specific, often multi-layered blocks to progress, which introduces a light tactical element beyond simple matching. This makes it excellent for short breaks, as individual levels can be completed in under a minute, yet the puzzle design encourages thoughtful planning. Features like special power-up gems, daily challenges, and a progression of increasingly complex block arrangements provide sustained engagement. The visual and sound design is polished, with satisfying feedback for chain reactions. However, reviews indicate the difficulty curve can become uneven in later stages, sometimes feeling more reliant on luck than strategy. The game is free with ads, which can be removed via purchase, and functions entirely offline—a significant plus for commuters or those in areas with poor connectivity. While it may not reinvent the genre, it executes its formula with a level of polish and consistency that makes it a reliable choice for puzzle enthusiasts seeking a low-commitment but mentally stimulating experience.