StackRush

StackRush is a pure precision stacking game. Colourful blocks slide in from the left and right sides of the screen in turn. Tap to drop each one onto the stack below. Whatever overhangs the edge gets cut off — and your block gets a little narrower. How high can you stack before the blocks become too thin to land on?
One tap. That is all it takes.
There is no complex input, no swipes, no timing bars. Just one tap at exactly the right moment. The challenge is entirely in your judgment and nerve.
Perfect drops grow your block back
If you drop a block with almost zero overhang on either side — a perfect drop — the block does not shrink. It actually grows slightly larger. Chain perfects together and you can keep your stack at full width for as long as your aim holds.
It speeds up
Every five blocks the slider moves a little faster. At first the pace is forgiving. By the time you reach twenty or thirty blocks it becomes a rapid-fire test of focus.