Orbit Cairn
Shape an orbiting cairn skyline to heights 2 / 4 / 3 / 1. Seven stones arrive with heights 2, 1, 1, 2, 1, 1, 2. Tap a column to add the next stone; AFTER each placement the whole four-column island rotates one step clockwise (last column becomes first). Adjacent columns around the ring may differ by at most 2, and no column may exceed 4. Targets stay fixed in the sky. Undo reverses both the stone and its orbit; no automatic defeat.
Controls & scope
Tap the board or named controls. Tab and Enter/Space operate buttons; R restarts. Undo supports reversible planning; no automatic defeat.
This is an original compact mechanic study, not a copy or full reproduction of the reference game. Research and scope are documented in README.md.
Original code & procedural visuals · Private local collection