How to Play Signpost
Each cell has an arrow pointing in a direction (up, down, left, right, or diagonal). The last cell (N²) has no arrow.
Number the cells from 1 to N² so that each cell's arrow points toward the next numbered cell. Cell 1 and cell N² are given as clues.
Click a cell to assign the next available number. Click an already-numbered user cell to remove it.
The arrow from cell k must point in the direction of cell k+1 (not necessarily adjacent, but in that direction line).