King of Mahjong is a connect-style tile-matching game that asks the player to match pairs of identical wooden tiles on a large grid without using more than three lines along the empty spaces to connect the tiles. The tile images include gemstones, butterflies and moths, and fruits. If the player does well, they receive a gold star for every space and tile on the board. They can change the tile images or double their star winnings by watching advertisements.
Although the player can connect side-by-side matching tiles, they earn more stars for performing matches spaced far apart on the grid. The game supplies a practice round before the standard levels play to show the player how the connect lines work.
It also supplies the player with tools that improve their chances of making fast connections and removing pairs of tiles from the grid, including a shuffle button that rearranges the tiles to open up new matches, a magic wand that randomly removes several pairs of tiles, and a hint magnifier that reveals pairs. If the player runs out of these tools, they can earn more by watching ads. They also win them after collecting a certain number of stars.
King of Mahjong provides a lot of fun challenges. It randomly moves tiles on the board during play. It also offers daily levels of play in calendar mode. If the player completes every daily challenge, they receive an achievement badge and a treasure chest at the end of the month.