In this 3D puzzle game, different colored germs appear on the screen along with small houses. Each germ has a matching house of the same color, and the player must send them to the correct place. The player drags a germ and drops it onto the house that has the same color. This simple action makes the game interactive and easy to understand. If a germ is placed in the correct house, a small feedback text appears on the screen to show that the move was right. This helps the player know they are doing the task correctly. However, if a germ is dropped into the wrong house, the level immediately fails. The player must carefully match every germ with its correct house. When all germs are placed into their matching houses successfully, the level is completed and the player wins the game.