Wow.... I found the first code I've written, back in 2012, thanks to Codecademy.

batman_vs_snowwhite.js

var confirm1;
confirm1 = confirm("Are you ready to play?");
if(confirm1===true){
    var age = prompt("how old are you?");
        if (age < 18){
            console.log("you are not old enough to play");
        }
        else{
            console.log("You may start your quest!");
        }
}
else if(confirm1===false){
    prompt("Ok, bye...");
}

if ((confirm1===true)&(age>=18)){
     console.log("Snow White and Batman were hanging out at the bus stop, waiting to go to the shops. There     was a sale on and both needed some new threads. You've never really liked Batman. You walk up to him.");
console.log("Batman glares at you.");
var userAnswer=prompt(console.log("Batman: Are you feeling lucky, punk?"));
console.log("You:",userAnswer);
if(userAnswer===("Yes")){
    console.log("Batman hits you very hard. It's Batman and you're you! Of course Batman wins!");
    var lose, max_score_value,choice,score;
    max_score_value=100;
    lose=5;
    score=max_score_value-lose;
    choice = prompt(console.log("What will you do? A=Kick Him!; B=Go out"));
        if(choice===("A")){
            console.log("Snow White takes her winchester 22 and call her little friends: the seven pixies!");
            var snow;
            snow = prompt(console.log("What will you do now? A=Call Chuck Norris; B=Get Killed"));
                if(snow===("A")){
                    console.log("You'll gain 5 in your score");
                    console.log("Your score:",score=score+5);
                    snow = prompt(console.log("What will you do now? A=Call Maria L˙cia;B=Kill Yourself"));
                        if(snow===("A")){
                            console.log("Maria L˙cia steals Snow White's winchester 22 then kills Snow White and Batman");
                            console.log("You won the battle");
                        }
                        else if(snow===("B")){
                            console.log("You killed yourself. Batman and Snow White get married. Maria L˙cia gets married with Jeremias Maconheiro. Both lived happy forever");
                        }
                }
                else if (snow===("B")){
                    console.log("You got killed. Batman and Snow White get married. Maria L˙cia gets married with Jeremias Maconheiro. Both lived happy forever.");
                }
        }
        else if (choice===("B")){
            console.log("You gave up the battle. Your score is:",score);
        }
}
else if(userAnswer===("No")){
    console.log("You did not say yes to feeling lucky. Good choice! You are a winner in the game of not getting beaten up by Batman.");
}
}

var feedback=prompt("Please, rate my game");

if(feedback>8){
    console.log("This is just the beginning of my game empire. Stay tuned for more!");
}
else{
    console.log("I slaved away at this game and you gave me that score?! The nerve! Just you wait!");
}