You are the wind. Drag to steer a tiny seed of ice as it falls for 30 seconds: left and right, and up and down to linger or rush ahead. The air it passes through decides how it grows.
While you fall, the box at the top lays your flake over the target's outline. Its rings glow when they match. Frost flakes are a separate collection: catch them if you can without losing your route.
Order matters. A plate that later meets star air sprouts branches from its tips. Read the target from the centre outwards, like tree rings (tap it on the home screen to see each ring explained). You get five falls a day, and on the first one a faint trail shows the target's route.