At the beginning of the game, various items will appear randomly in the upper box. Players need to select items from the upper box and place them in the horizontal frame at the bottom of the game. The horizontal frame can hold up to five items. When there are three identical items in the horizontal frame, these three items will be eliminated. If there are five items in the horizontal frame, the challenge fails. Successfully eliminate all the items in the upper box to challenge a higher level of difficulty.