“GB BLOCK" is an interesting and classic square game! Our jigsaw is not just that one. It's simpler and more addictive! Once you start, you won't stop playing. Try it, you'll like it! HOW TO PLAY GB BLOCK? 1. Simply drag the blocks to move them. 2. Try to create full lines on the grid vertically or horizontally. 3. Blocks can't be rotated. 4. No time limits.