Step 1 · the big seabed: climb, hide, squeeze through
Tap your edge's strip to join. Then drag anywhere in your strip to steer: your crab goes the way your finger points, faster the further you drag. Flick fast to dash: it slips you past another crab, and a dash into a flat rock with a glowing rim hops you up on top. Walk off the edge to hop down. Seaweed slows you and hides you, rubble slows you a little, cliffs block you except at their crack, and you can walk under arches and wrecks. Tap with a second finger to pinch. Laptop: arrows + space + Shift for Coral, I J K L + U + O for Violet, G brings in Gold and Teal. D shows details.