Press the corresponding arrow keys when it lines up, and hold the keys when there's a trail.
➡ ⬇ is uh-oh ⬇ ⬇ ⬆ ➡ is the first 4 notes of megalovania ⬆⬅⬅↔⬆↩↩↘⤵↙⤴↩⬅↕↕↔↔⬆⬇↗↗↘↘⤴↙ is a mess
