Swipe a Dudu onto its neighbor to swap them, or tap one and then the one next to it. Three or more of the same outfit in a line pop, and whatever is above falls down, sometimes setting off a chain. A swap that makes no match bounces back, and if the board runs out of moves it reshuffles itself. Four in a row leaves a sweeper that clears a whole row or column. An L or T shape leaves a bomb. Five in a row leaves a prism: swap it with any Dudu and every one of that kind pops. Swap two specials into each other for a bigger combo. There are 20 levels with a set number of moves. Goals change as you go: reach a score, pop a certain number of one Dudu, crack the ice under the tiles, break stones, or drop moon lanterns all the way to the bottom. Moves you don't use turn into sweepers at the end. Each level gives one to three stars, and your stars and best scores stay on your phone. Endless mode starts with 25 moves and gives one back for every chain of three or more. The Dudus, stones and lanterns are the Y Build app's own drawings. The cover illustration was generated with AI from the game's sprites; the title on it was added afterward. The sound effects also come from the app, and the background music was generated with AI.