4 difficulty levels, 5 different sizes. Thousands of unique grids to play. LogiBrain Binary is a challenging logic puzzle game. Although the binary puzzle consists only of zeros and ones, solving is certainly not easy. LogiBrain Binary includes 2000+ puzzles in different sizes and different levels of difficulty; easy (1 star), medium (2 stars), hard (3 stars), very hard (4 stars); It seems simple, but it is yet addictive! We can guarantee you hours of fun and logic. What are binary puzzles?