You were sent to detention for making out in class, and here you are again about to make out during detention! That's very naughty, but that also makes it fun! Be careful that no one sees you. As you progress through the levels, more people are going to wonder what's happening in the back of the room . . .
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.