There's one square. It slides left and right across the screen and you tap to stop it. If more than half of it is sitting on the square underneath, it stays and the next one starts sliding, a bit faster than the last. If you're off by more than half, the tower's done and you get a number.
I made this because I wanted a stacking game where the number meant something. So the board is the whole point here. While you're playing, the game keeps checking where your current height would put you against everyone else who's played, anywhere, and shows it in the corner. It also draws the best players' heights as lines in the background, with their names, so when you go past one you know whose it was. Mine is on there. It's not that high.
There are skins for the squares, and they're sold in fixed batches with serial numbers. Twenty-five of the gold one, that's the whole supply, and once those are gone I'm not making more. Everyone on the board can see which one you're using. They don't change how the game plays.
There's no sign-in and there are no ads. Sound and vibration are on when you first open it; you can turn either off in the settings.
Tap to stack. Every run ranked against the whole world, live.