theendingisalwaysdeath.js

// Check if the player is ready to play!
confirm("Are you ready to begin?");

// How old is the player?
var age = prompt("How old are you?");

if (age < 18) {
    console.log("Fine, you can play, but I'm not responsible for you.");
} else {
    console.log("Let's go!");
}

// The thought-provoking, award winning, fantastical plot. 
// No applause necessary. 

console.log("You're walking down the road, minding your own business when you're approached by an elderly woman.");

console.log("\"Help me!\" she says.");

var userAnswer = prompt("Do you want to help this elderly woman?");

if (userAnswer.toLowerCase() === "yes") {
    console.log("You approach her. She hits you in the face with her bag. You die.");
} else if (userAnswer.toLowerCase() === "no") {
    console.log("You walk away from her. She catches up to you and hits you in the face with her bag. You die.");
} else {
    console.log("Useless Error notification, indicating you messed the game up. Congratumalations. You die.");
}

// Rate my game pls
var feedback = prompt("On a scale from 1-10, how good was this game?");
if (feedback > 8) {
    console.log("Too right.");
} else {
    console.log("I hit you in the face with my bag. You die.");
}

Thanks to @benhowdle89 for the help with the .toLowerCase() function :)