Stack

A block slides back and forth above a tower. You tap to drop it. Whatever hangs over the edge is sliced off and falls away, so the next block is narrower. Miss badly enough and there is nothing left to land on. There is no second mechanic, no upgrade screen and no currency, and the result is one of the most quietly confident games on the store.

How it plays

Each tap places a block and each imperfect placement costs you width. Place several perfectly in a row and the tower actually grows back, which is the one piece of generosity in the design and the thing that turns a short game into a long one. The camera rises with the tower, the colours shift gradually as you climb, and that is genuinely all there is.

What's great

It is beautifully judged. The perfect-placement reward means good play compounds, so a run that starts well tends to keep going, and the pressure builds naturally as the tower narrows. It launches in a second, runs on anything, works offline, and the colour gradient as you climb is a lovely piece of restraint. There is nothing to learn and nothing to manage.

What holds it back

There is not much of it. You will see everything the game has in the first ten minutes and the rest is score-chasing, which not everyone wants. The free version shows an ad after most runs, and when a run lasts forty seconds that ratio grates. It also has no meaningful failure feedback — you simply stop, with no sense of what you might do differently.