Play with five overlapping 9x9 grids. Solve puzzles following standard rules. Choose from five difficulty levels and various types like Gattai and Butterfly. Use the Hint feature to auto-fill the board with non-conflicting numbers.
Merge numbers by matching three identical ones to create higher values. Empty spaces appear after merges, allowing new numbers to fall from the top. Use combos to earn extra points and pause falling numbers temporarily.
Solve puzzles by removing nails from tangled metal bars and boards. Clear all items by placing nails in limited holes. Progress through stages with increasing difficulty. Track completed levels and retry puzzles.
