Yarn: one thread through the whole grid

A path puzzle: the cat has unwound the ball of yarn, and the thread must go through every cell, once each, following the numbers.

• Start at 1 and drag the thread from one cell to the next, across or down.
• Pass the numbers in order (1, 2, 3…) and end on the highest. On Tough there are walls the thread can’t cross.
• The thread must fill every cell, each one once. Go back the way you came, or tap a cell of the thread to cut it there.

CA ES