Tower Stack

🕹️ How to play

1. Start stacking: The first block is already sliding when the page opens — there is no start button. Tap the screen (or press Space) when it lines up with the floor below and it drops into place as a new floor.
2. Read the slice and the perfect: Whatever hangs over the edge is sliced off and tumbles away, so the next block is only as wide as the overlap. The seam shows the exact miss, like “10.0% right”. Land within 1.5% of the stage width and it snaps perfectly into place with a golden flash — nothing is cut.
3. Miss once, play again: If the block misses the tower completely, the run is over. The result card shows score, floors, perfect drops, best streak and how far you missed. “Play again” starts the next block sliding within a second, with no ads in between.

📖 Rules & variants

Core rules: the stage is 1000 units wide and the base is 400 units (40%). Each block enters from the left or right and slides back and forth at a constant speed; the moment you press is the moment it is judged. If the block's centre is within 15 units (1.5%) of the tower top's centre it is a perfect drop and lines up exactly. Otherwise only the overlapping part stays and the overhang is cut off. No overlap at all ends the run — there is no timer, no lives and no continue.

Scoring: every floor that lands is worth 10 points. A perfect drop adds 10 × your current streak, capped at a 5-streak (60 points per block at most). A sliced drop resets the streak. Example: block 1 lands 10% right and is cut (+10), blocks 2 and 3 are perfect (+20, +30), block 4 misses 35% left — 60 points, 3 floors, 2 perfects.

Getting wider again: every 6 perfect drops in a row widen the new floor by 40 units (20 on each side), up to the starting width of 400. The six dots in the HUD track this streak with a “N more to widen” counter; any slice resets it.

Speed table: 7 tiers, one step up every 10 floors — 600 units per second for blocks 1–10, then 720, 840, 960, 1080, 1200, and from block 61 on a fixed 1320. The speed never drops back mid-run. Each step flashes a “Faster” badge and the hint bar always shows “Speed n/7”. In time terms the perfect window is about ±25 ms at tier 1 and ±11 ms at the top tier.

Modes: Free play shuffles the entry sides every run. Daily tower builds the same entry sequence for everyone on the same date and keeps a local “today's best”. Pass & play lets 2–4 people take one run each on the same sequence, ranked by score, then floors, then play order; equal score and floors share a rank. Pass & play runs never touch your personal best.

Stacking tips: watch the block's edge, not its centre, and press when that edge meets the edge below. The narrower the block, the more you should wait for it to swing back to the middle instead of rushing at the ends. At a 4–5 streak, slow down and take an extra pass to land the sixth perfect. The first block after a speed-up is the easiest to miss — watch one full pass first.

❓ FAQ