Play a falling-blocks puzzle in your browser: turn and drop pieces to clear lines, with hold, a three-piece preview, ghost piece, levels and a saved best.
Pieces of four squares fall into a well ten columns wide. Turn them, slide them, and fill a whole row to make it vanish; leave gaps and the stack creeps up until a new piece has nowhere to appear. Block Stacker is that falling-blocks puzzle, built to feel right on a keyboard and playable with buttons on a phone, with nothing to install.
Clearing one, two, three or four rows at once is worth 100, 300, 500 or 800 points, multiplied by the level, so a four-row clear on level 3 scores 2,400. Each row a piece falls by soft drop adds 1 point and by hard drop 2. Every 10 cleared lines raises the level, and gravity follows the guideline curve (0.8 − 0.007 × (level − 1)) raised to the power (level − 1) seconds per row: a full second at level 1, about 0.36 s at level 5 and 64 ms at level 10.
A turn that would push a piece into a wall or another block is not simply refused: the game tries up to four small nudges first, the standard SRS kicks, so the long bar can still turn flush against the right wall. When a piece touches down it waits 0.5 seconds before locking, and each successful move or turn on the ground restarts that wait, up to 15 times. Pieces come from a shuffled bag of all seven, so you never wait more than twelve pieces for the long bar. The game ends when a new piece cannot appear; your best score is kept in this browser.
Hold
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Lines
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Level
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Block Stacker
or press Enter
Next
← → move · ↑ or X turn right · Z turn left · ↓ soft drop · Space hard drop · C or Shift hold · P pause. Tap the well to turn.
When time is up the sound repeats, the tab title flashes and phones vibrate. Click or press any key on the page to stop it. Browsers only allow sound after you have clicked on the page once, so press Test sound if you will leave this tab untouched.