一筆書きパズル：なぞって脳トレ

The classic one-stroke puzzle: drag your finger to pass through every cell in a single line. How many boards can you clear in 90 seconds? HOW TO PLAY 1. Start tracing from any cell you like 2. Connect to neighboring cells and cover the whole board in one stroke! 3. Stuck? Lift your finger to retry (you can also step back one cell) 4. Boards get bigger and harder as you clear them FEATURES - No tutorial needed. Anyone can play instantly - Tests both your logic (where to start) and tracing speed - Best score is saved automatically - Share your results and compete with friends - Works offline. Perfect for commutes and waiting time - Available in English and Japanese That satisfying flow of solving one after another. Can you clear 8 boards in 90 seconds? Give it a try!