Stacko is a one-button tower builder and the first cabinet in the Bakko arcade. A block slides across the screen; you tap to drop it. Land it clean and the tower grows. Land it badly and the overhang is sheared off, so the next block has less to aim at.
One input, one skill: timing. The whole run is sixty seconds, and it is free to play in any browser with no download and no account.
Stacko has two other modes. The Daily gives every player in the world the same seeded tower and exactly one attempt, and keeps a streak. Ghost Duel is an asynchronous one-versus-one where your entire run is packed into a link you send to somebody.
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