Classic Onet / 连连看 puzzle — connect matching tile pairs with a path of at most two bends to clear them.
Each level fills a grid with tile pairs showing icons. Tap one tile, then tap a matching tile.
If there's a path between them that uses only empty cells (or the outside of the grid) and bends at most twice (straight, L-shape, or Z-shape), both tiles clear with a brief golden line showing the path.
Clear all tiles to advance to the next level (bigger grid, more icon types).
If no matching pair can be connected anymore, the game ends.
Goal: clear as many levels as possible.
A pair can only be cleared if a path between them bends at most twice, so tiles out in the open — along the edges and in already-thinned areas — are almost always connectable, while tiles buried in the middle of a packed block are not. Work the outside inward, peeling the border tiles first to open up routes to the ones trapped behind them.
The danger is letting two of a kind get permanently walled off from each other; once every path between them needs three or more bends, that pair is dead and the level can become unwinnable. So before clearing an easy match, check whether removing it opens a path for a more awkward pair, and prioritise tiles that are blocking several others. When multiple matches are available, pick the one that frees up the most while keeping every remaining pair still connectable.