Sharp Sketch-Line

Sharp Sketch-Line is a casual puzzle game. The core gameplay is to fill all the blank squares in a level with one continuous stroke. Each level is different, and the game features an endless mode. Specific rules:
1. Complete it in one continuous stroke: You need to swipe horizontally or vertically on the screen with your finger. The process cannot be interrupted or your finger lifted; it must be completed in one stroke.
2. Fill all squares: The goal is to cover all the blank squares with the path you swipe. You cannot pass through the same square twice or skip any.
3. Fixed starting point: Each level clearly marks the starting point, and you need to plan your path from there.
Come and give it a try!