Stack the falling blocks and clear as many lines as you can.
Clear full rows to score. Speed increases every 10 lines.
Tip: press P to pause at any time.
Seven differently-colored pieces — the classic I, J, L, O, S, T, and Z shapes — fall one at a time. Move and rotate each piece to fit it into the stack below. Whenever a full horizontal row forms, it clears and everything above drops down a level, adding to your score.
Controls: arrow keys to move, drop, and rotate, Space for an instant hard drop, or the on-screen buttons on mobile. The game speeds up every 10 lines cleared, and ends when the stack reaches the top of the board.