Find the Missing Numbers in each wallpaper. 100 points for each number. Faster clicking gives you more points. Clicking the wrong spot deducts your score by 100. Earn timer bonus at the end of each level. Boost your score with In-game Achievements!
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.