You drag a whole row or column of flowers sideways or up and down, so that identical flowers end up next to each other. Connect three or more and they are removed.
Every level has a target: remove the number of flowers shown in the indicator. Focus on the flowers the level asks for, and try to make several matches with a single drag. It is a calm HTMLGames puzzle with a bright garden menu, a good way to unwind for a few minutes. The same connect-three logic appears in Match 3 Jewels.