Stack Smash

Tap or click to drop the moving block. Perfect aligns grow the tower; misaligns get sliced. How high can you go?

Best 0

Tap to drop

Tower fell!

Score

Perfect streak

All-time best

All games

Tip: Perfect aligns (within 4px) restore lost width. Stack until the block falls off entirely.

How to play Stack Smash

Stack Smash is a precision block-stacking game in the tradition of arcade tower games. A block slides horizontally across the screen at the top of your tower; tap to drop it. The portion of the block that overlaps with the block below stays. The portion that hangs off the edge falls away. Every miss shrinks your block, so a perfect stack is the only way to keep size — and every drop happens slightly faster than the last.

Score is height-based. Each block is worth more than the one below it, so the upper layers carry most of the scoring weight. The block slides faster as the tower grows, the colors shift across a gradient as you climb, and a perfect stack (precise alignment with no shrinkage) adds a bonus pulse and a small visual reward. There are no levels or chapters — it's a single endless climb.

Tips

Tap early on the return. Most players over-time the tap. Aim for the moment the block reaches the center of the layer below, not when it's directly above.
Don't chase perfects on the first 5 blocks. Build size. The chip-away losses on layers 1–5 cost you less than a tower collapse from misalignment.
Track the speed-up. Each block is roughly 4% faster than the last. The speed-up is constant, not exponential — so the difficulty curve is predictable.
Watch the gradient. The color band is a height indicator. Halfway through a band, you're about to hit a speed milestone.

Difficulty & play time

Difficulty: medium. Each run is 30 seconds to 5 minutes depending on how far you get. Sessions can stretch to half an hour if you're chasing a high score. Suggested age: 6+. Pure reflex — nothing to read, nothing to learn, accessible to any age.

Frequently asked questions

Is there an end?

No. The tower goes up forever; the block keeps speeding up. Highest reported towers are in the 400-block range; a clean 200-block run is solid play.

Does my best score save?

Yes. Your best run is stored in browser local storage and shown at the top of the screen.

Why does my block get smaller?

Every time you stack imperfectly, the overhang gets sliced off. The next block is the same width as what stayed. Many imperfect stacks in a row will shrink your block to nothing.