Block Stack Puzzle

Rotate the falling blocks, fill whole rows and clear them before the stack reaches the top.

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🧱 Block Stack

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A classic falling-blocks puzzle

Blocks of seven shapes fall one at a time. Slide and rotate each one so it fits neatly into the stack below — when a row is completely filled, it disappears and you score. Clear several rows at once for big bonuses, but don't let the stack reach the top! Block Stack is built for phones with large buttons and swipe gestures, works with a keyboard on computers, and saves your best score.

How to play

  1. Tap Start. A block appears at the top and starts falling.
  2. Move it left or right and rotate it to fit the gaps.
  3. Complete full rows to clear them. Every 10 rows, the speed goes up.

Strategy tips

  • Keep the stack flat and avoid leaving holes under overhangs.
  • Leave one column open at the edge for the long straight block — clearing four rows at once scores 800 × level.
  • Watch the “Next” box and plan two blocks ahead.
  • Use the landing preview to line up drops precisely, then tap ⤓.

Example

On level 2 you've built a flat stack eight rows high with the far-left column empty. The next block is the long straight piece: rotate it upright, slide it to the left wall and drop — four rows clear at once for 800 × 2 =1,600 points. Prefer something calmer? Try 2048 orsnake.

Frequently asked questions

How do I play Block Stack on a phone?
Use the buttons under the board: ◀ ▶ to move, ⟳ to rotate, ▼ to drop faster and ⤓ to drop instantly. You can also tap the board to rotate and swipe left, right or down.
What are the keyboard controls?
← → move, ↑ or X rotates, ↓ drops one row faster, Space drops the block straight down, and P pauses.
How is the score calculated?
Clearing 1, 2, 3 or 4 lines at once earns 100, 300, 500 or 800 points, multiplied by your level. Every 10 lines you move up a level and blocks fall faster. Dropping instantly also adds a small bonus.
What is the faint outline at the bottom?
That is the landing preview — it shows exactly where the current block will land if you drop it now.