Block Stacker
Blocks fall one at a time into a 10-wide well. Move and rotate each piece to fill complete rows, clear them for points, and keep stacking before the well fills to the top.
Alongside the seven classic tetromino shapes, two bonus pieces — a plus-shaped block and an S-curve block — show up in the mix, keeping even experienced players reading each piece carefully.
How to Play
- Move: Left / Right Arrow keys
- Soft drop: Down Arrow
- Rotate: Up Arrow, or click/tap the board
- Hard drop: Spacebar
- Mobile: on-screen rotate / move / drop pad
About This Game
Block Stacker is a classic line-clearing stacking puzzle. Pieces fall from the top of a 10-wide, 24-tall well, and your job is to slot each one in so it completes a horizontal line. Complete lines clear and award points; the well empties from the bottom up. Let the stack reach the top and the run is over.
Why We Built It
Stacking puzzles are a genre most players already know by feel, so we wanted to keep the core controls completely familiar while adding a small twist. The seven standard tetromino shapes are joined by two extra pieces — a plus-shaped block and an S-curve block — that don't behave like anything in the standard set. Veteran players who can place I- and T-pieces on autopilot have to slow down and actually look at the next drop again.
How It Works
The well is 10 columns wide and 24 rows tall. A new piece spawns at the top roughly every 650 milliseconds at first, automatically dropping one row per tick. You can shift it left or right, rotate it (with wall-kick adjustment so rotations near the edges still work), or hold down to soft-drop, or hit space to hard-drop it straight to the floor. Once a piece lands, it locks in place after a brief 110-millisecond pause — long enough to see a quick white flash confirming the cells are set. Any completed row clears immediately for 100 points, and the drop speed increases every two lines cleared, down to a floor of 180 milliseconds per row.
Tips & Strategy
- Keep the surface of your stack as flat as possible — uneven stacks make it much harder to slot in later pieces without leaving gaps.
- Save hard drops for placements you're already sure about; once you hit space, the piece locks immediately with no chance to adjust.
- The two bonus shapes rotate differently than any tetromino, so rotate them once in an open area before you commit to a placement.
- Clearing lines near the edges of the well is usually safer than the center, since it leaves more open space to recover from a mistake.
Ideas for Improvement
- Next-piece preview — show the upcoming piece so you can plan a placement in advance.
- Hold slot — let players store one piece aside for later instead of always taking the next drop.
- Combo scoring — bonus points for clearing lines on back-to-back drops.
- Marathon vs. sprint modes — an endless mode alongside a race to clear a fixed number of lines.