Fill a horizontal line to clear it. Swipe sideways to move; tap the grid to rotate. Press and hold the grid to fall faster; release to slow down. Lift and press again for each new piece. You can also swipe down or hold Lower. Drop places the piece immediately. Hold saves one piece per turn.

Keyboard: ← → move · ↑ / X rotate · Z reverse · ↓ lower · Space drop · C hold · Esc / P pause.