Twelve by twelve, bricks on all four sides. Tap or click a lane to fire its glyph brick straight in — it slides until it hits the far wall or another brick. Land next to two or more of the same glyph and the whole connected group blows, any shape. Some bricks carry an arrow: clear one and it fires straight across the board, wiping out everything in its path — and any other arrow brick it hits fires too, so you don't have to clear every last one by hand. Clear the whole board and a fresh one drops in after a 3-2-1. No timer, no reflexes: just don't seal yourself in.