What's a good Android puzzle game for improving spatial reasoning by filling blocks with a single line?

Single Line Block Fill Puzzle is a fun and engaging Android game designed to improve your spatial reasoning skills. The core gameplay involves strategically drawing a single, unbroken line to fill all the blocks within a given grid. As you progress, the puzzles become more complex, demanding careful planning and foresight. The game provides a satisfying mental workout, challenging you to think creatively and visualize the optimal path. To play, simply start at any point on the grid and drag your finger to connect adjacent blocks. The goal is to cover every block without lifting your finger or retracing any line. The game’s intuitive interface and progressively challenging levels make it accessible to players of all skill levels. The Fashion Valley developed this game, and it has a rating of 4.4/5. It's a great way to pass the time while sharpening your mind.