By pressing "Play" button, the excitement begins.
You will see with 3 buttons and 3 choice. 1 out of 3 options will bring you to the next level.
The only thing you have to do is to trust your chance and to find the correct option by pressing one of the three buttons.
Have fun ..
Choose the one of the buttons...It's just that easy...
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.