Ignore the header in the old store text calling this a 'physics merging' game — it isn't one, and what's underneath is better: classic mahjong solitaire, well explained. Every board is a stack of tiles. Only the top ones are free. Match two, tap, gone — and the tile underneath sees daylight for the first time.

The strategy lives in sequencing: the question is never which two tiles match, it's which two to clear FIRST. Clear the outer ring and the tiles walled in at the center open up; clear the wrong pair and you bury your own last match; clear the right one and the stack can come down in a single run. Every removal redraws the board's options.

Two safety valves keep dead ends from being endings: shuffle when you're stuck, undo when a move was a mistake. Boards are hand-built, ranging from gentle warm-ups to layouts that make you stare — though in an endearing publishing slip, the feature list still says '[NUMBER] hand-built boards': the developer never filled in the count, so the honest answer to 'how many?' is that nobody published it.

What is published: a tiny, well-loved release (5K+ downloads, 4.9 rating) and an explicit note that the game involves no real money or gambling of any kind. Among this catalog's several mahjong variants, this is the purist's layered-stack version — no gallery, no gimmick, just you against the order of your own taps.