Place shapes on a 9×9 board and clear rows, columns or 3×3 boxes. Rotations cost credits that you earn through play, so deciding when to rotate is part of the strategy.
There’s also a daily challenge: use the Shape of the Day to earn bronze, silver or gold medals and extra rotation credits. Prefer a simpler challenge? Classic mode turns rotations off.
H-BLK is completely free, with no ads.
I’d love to hear how your first game goes—and whether the rotation system feels clear when you start playing.