Super Collapse type of game: Remove the virusses from the playing field by clicking on groups of the same color.
Click on connected groups of virusses of the same color, groups with 3 or more of the same virusses will be removed. Also try to use the bonusses (on the right) and click on those for extra points or color changes.
A context menu should be shown when right-clicking or, on touch devices, long-pressing in the game. This menu especially allows to play in full screen and control the volume.