My code only prints a score of 0?

Every time I run this program the score of 0 always comes up even when you answer the questions correctly ?

var score = 0;

//START OF QUESTIONS var questionOne = prompt("What colour is the door?"); if (questionOne.toUpperCase === "GREEN") { score += 1; }

var questionTwo = prompt("What colour is the phone?"); if (questionTwo.toUpperCase === "BLACK") { score += 1; }

var questionThree = prompt("What are you coding with?"); if (questionThree.toUpperCase === "TREEHOUSE") { score += 1; }

var questionFour = prompt("What's the best phone?"); if (questionFour.toUpperCase === "SAMSUNG") { score += 1; }

var questionFive = prompt("What's the best name?"); if (questionFive.toUpperCase === "JACK") { score += 1; } //END OF QUESTIONS

//SCORING AND RANKING THE PLAYER if (score === 5) { document.write("<p>GOLD! You got the gold crown and scored " + score + " points!</p>"); } else if (score >= 3) { document.write("<p>Not bad! You got the silver crown with " + score + " points!</p>");

} else if (score <= 2) { document.write("<p>Could be better! You got " + score + " points. You get the bronze crown.</p>");

} else { document.write("<p>Oh no! you got no crown! " + score + " points at all!</p>"); }