Codeacademy Javascript Code Adventure Game

//Check if the user is ready to play!
confirm("Are you ready to play?");
var age = prompt("What's your age?");
if(age <= 18)
{
console.log("Go away.");
}
else
{
console.log("Come along.");
}
console.log("You are at a Justin Bieber concert, and you hear this lyric 'Lace my shoes off, start racing.'");
console.log("Suddenly, Bieber stops and says, 'Who wants to race me?'");
var userAnswer = prompt("Do you want to race Bieber on stage?");

if (userAnswer === "yes")
{
    console.log("You and Bieber start racing. It's neck and neck! You win by a shoelace!");
}
else
{
    console.log("Oh no! Bieber shakes his head and sings 'I set a pace, so I can race without pacing.'");
}

var feedback = prompt("Rate game 1 - 10.");

if (feedback = 8)
{
    console.log("Thank you! We should race at the next concert!");
}
else
{
    console.log("I'll keep practicing coding and racing.");
}