Move with the stick at the bottom. Hold a direction and you'll glide; push another way and you'll take the next turn there.

Find the exit. It's a ring in one of the far corners. You start in the bottom-left.

Chalk is your memory. Pieces lie in dead ends — walk over one to take it. The counter above the stick shows what you carry.

Mark the floor by tapping the chalk, then choosing a sign — an arrow, an X, a question. One chalk, one mark where you stand. Marks are permanent.

Charcoal draws a map as you walk. Tap it to begin; the stick wears down as it draws; ground you've already mapped costs nothing. Tap it again to pause. The map button beside it shows what you've drawn.