As its name suggests, the test, very funny, can evaluate the IQ of a person mean by not the IQ intelligence quotient, but rather the quotient of idiocy because the test starts very low. Indeed, it is a kind of Jacadi where you just follow the instructions to the letter. Which, apparently, is not so obvious that because the first levels you determine the trap closes and if you do not get out of this conditioning.
Console yourself if you can't go to the end the first time, it's normal, but you worry if you never arrive!
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.