PlayZerrin

A logic puzzle in the deep sea. Each pool is a board of water and rock, and the lamps are luminous jellyfish. Light every patch of water, keep jellies from shining on each other, and match each number on a rock to the jellies beside it. Every pool has one solution. Follow the descent zone by zone. Sunlight zone · The rules Tap a square to place a jelly, then a bubble mark, then nothing. Hold to drop a bubble straight away. A ring of light ripples out from each fresh jelly, clashes show in coral and satisfied numbers turn green. Twilight zone · The endless run Pools come one after another and grow every second pool, from 7×7 up to 12×12. Surface whenever you like to end the run. Your depth is the number of pools solved, and the record and the last 20 runs are logged. Midnight zone · Daily pool One pool a day, the same for every diver, sized by the day of the week. Keep a streak going and see the last two weeks on a calendar. Abyss · Collection Six palettes, from Lagoon and Violet Bloom to Plankton Mint, and four creature shapes, from Moon jelly to Lantern lure. They open through solved pools, deep runs, streaks and the quiz, and change how the board looks. Trench · Quiz and log Twelve true-or-false statements per round from 24 real facts about bioluminescence, from fireflies and glowing fungi to the vampire squid. The dive log keeps bubbles of totals and your recent runs. Back on the surface A floating button opens a radial menu of six bubbles. Behind every screen, soft orbs drift, plankton rises and shafts of sunlight fall from above. This animated background can be switched off in Settings, where haptics, the rules and a reset also sit. No sound, no account and fully offline.