About Hard Mode
A full 12-tile grid with just 4 seconds to spot the odd one — a serious attention workout.
Good for: teens, adults, brain-training sessions, competitive players.
About the Coral Reef Theme
Coral reefs are underwater cities — busier than any high street and twice as colourful. Dive in among the clownfish, octopuses and sea turtles for the brightest matching on the site.