Join the numbered islands with bridges. A bridge runs straight — horizontal or vertical — between two islands, and a pair can be linked by one or two bridges.
- Each island must end with exactly its number of bridge ends.
- Bridges never cross each other and never pass through an island.
- When finished, every island must be reachable from every other — one connected web.
- Tap the gap between two islands to add a bridge; tap again for a double; once more to clear.
- An island turns green when its count is right, red when it has too many.
