prompt if/else

// Check if the user is ready to play!
confirm ("You ready to play!");
var age =  prompt("What's your age");
if(age < 13){
    console.log("user that they're allowed to play but you take no responsibility.");
}
else
{
    console.log("give them an encouraging message to play on!");
}
var myName = "You are at a Justin Bieber concert, and you hear this lyric 'Lace my shoes off, start racing.'";

console.log(myName);
var storyline = ("Suddenly, Bieber stops and says, 'Who wants to race me?'");
console.log(storyline);
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 if(userAnswer !== "yes") {
    console.log("Oh no! Bieber shakes his head and sings 'I set a pace, so I can race without pacing.'");
}
var feedback = prompt("rate your game from  1-10, what is you rate?");
if(feedback > 8){
    console.log("Thank you! We should race at the next concert!");
} else if (feedback >! 8){
    console.log("I'll keep practicing coding and racing.");
}