Pick a color and flood the board. You can't take a color a rival is holding, so every pick is also a block.
1You start in a corner. On your turn, tap a color: your whole territory turns that color and floods into every touching tile of it.
2Colors your rivals hold are locked for you. Take the color they need next to cut them off.
3Pearls are worth 3. Driftwood can't be flooded. Most points when the board fills wins. Press and hold a color to preview it.