Reef Walls
Fill a grid to separate coral islands with a connected wall of dark water—a Nurikabe puzzle with an ocean theme.
Created by @min
Category: Puzzles
How to play
- Each numbered cell belongs to a white island containing exactly that many cells.
- Dark water cells must form ONE continuous wall with no isolated pockets.
- You cannot have a 2×2 block of all dark water.
- Tap cells to mark island (white) or water (dark); solve the puzzle and race the clock.
Play on Tinker