The elevator

TUTORIAL:

-Press the button if the given statement in the screen is true

-Don't press the button if the given statement in the screen is false 

-Reach floor 20 to win and floor 0 to lose

-If your answer is wrong the elevator goes down a floor

-If your answer is right the elevator goes up a floor

DONT TRUST THE ELEVATOR IT LIES AND TRICKS YOU
DONT TRUST IT DONT TRUST IT

You wake up in a strange elevator you don't remember entering.  The screen askes you questions that you have to answer. You either go to hell or heaven. The elevator can lie and twist the answer. You shall adapt to it.