Castle Stacker is a free one-tap tower-stacking game set on a beach at dusk. A seagull swings a sandcastle block back and forth above your tower — tap, click or press Space to drop it. Any overhang gets sliced off, so the narrower your block becomes, the harder every following drop gets. Land inside the perfect zone to keep your full width and build a combo: three perfect drops in a row regrow your block, and golden ★ blocks are worth five times the points.

How do I pause? Press P or Esc, or tap the ⏸ chip in the top corner.

Does it work on my phone? Yes — it runs in any modern browser, portrait or landscape, with nothing to install.

Is my progress saved? Your best score and tallest tower are stored locally in your browser.

Castle Stacker is part of Playing in the Sand, a growing collection of free beach-themed browser games.