PlayReflex Rush
Gravity Flip
A one-button gravity runner — flip between floor and ceiling and outlast the spikes.
Timing Trials
Stack Tower
The classic slab stacker with perfect-drop recovery — one careful breath per block.
★ 4.8 / 5
plays 31,150
Difficulty Easy
Players 1 player
Drop each slab on the one below. Miss the overlap and the slab gets trimmed.
Stack Tower runs completely inside your browser — nothing to install, no account, no download. The board is drawn on a 960×540 canvas that letterboxes itself to any screen, so it plays the same on a laptop, a Chromebook or a phone in landscape.
How this version plays
The whole run is built around one idea: Click / press SPACE to drop the moving slab / Land it on the tower for points. We tuned the speed curve so the first thirty seconds feel gentle, and by the second minute you are genuinely busy.
Scoring
A normal drop pays 12 points; a centred drop pays 40 and widens the next slab by 22 pixels. Three lives, and the block speeds up 11 px/s per storey.
Why we kept it small
The perfect-drop recovery is what makes it addictive: you are never out of the game until the slab is truly gone, so every block is worth one more careful breath.
How to play
- Click / press SPACE to drop the moving slab
- Land it on the tower for points
- The overlap shrinks every level u2014 perfect drops rebuild it
Controls
SPACE, click or tap drops the sliding slab.
FAQ
Does the tower move up the screen?
Yes u2014 the camera follows the top of your tower so the action always stays in view.
What counts as a perfect drop?
Landing within 8 pixels of the centre of the slab below.
How tall can a tower get?
There is no cap; block speed grows with height, which is what eventually ends most runs.
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