How do I rotate the shape?

To see arrows on every side, you can rotate the shape freely.

Drag with one or two fingers anywhere on the screen. The shape rotates and shifts to follow your gesture.

Your view is remembered between levels and after you close the app, so you come back to the angle you left.

If you use a hint and the highlighted arrow is on a side that's currently hidden, the shape rotates automatically to bring the arrow into view.