Examine your observing skill by finding the listed numbers which are hidden in the picture of the fantasy world. You have 5 minutes to find the all numbers in each levels, or you will lost. Click the "Hint" button for help. Avoid clicking unnecessarily, as otherwise your score will get reduced.
Use mouse to point and click.
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.