rotate rows and columns, line up 3+ of a color, try to clear the whole board
Blocks left: 0 · Rotations: 0
Mode: move — press space to grab a row/column
← ↑ → ↓ move the cursor · space grab / release the selected cell
while grabbed: ← → rotate its row · ↑ ↓ rotate its column
matches clear after every rotation — cleared squares stay empty. clear them all to win.