SPOILERS BELOW!
How the game fits the theme:
Failing to do your duty correctly results in illusions forming that suggest the world may not be as it seems
"Illusions" form when you do not drink the cocktail, ie do not comply.
Continued non-compliance results in part of the world showing that you cannot normally see, dubbed "illusions" by the powers that be
In actual fact, the world you have been led to believe is the illusion, created to keep you a dutiful worker who does not question their dedicated tasks. The cocktail serves not to enhance focus, but to keep you from seeing the truth.
Elements of the gameplay itself are also an illusion (you do not necessarily have to do what you're told!)





















































