Console game for OO JavaScript practice

camel.js

var prompt = require('prompt');
prompt.start();

WELCOME = [
"Welcome to Camel Run!" ,
"You have stolen a camel (you egg!) to make your way across the great Mobi desert." ,
"The townspeople want their camel back and are chasing you down! Survive your" ,
"desert trek and outrun the blockos." ,
"Only drink when necessary. Always use E. to display your status!" ,
"Do not let your thirst go above 6 and your camel's tiredness above 8."
].join("\n")

MENU = [
"Here are your choices:",
"A. Drink from your canteen.",
"B. Ahead moderate speed.",
"C. Ahead full speed.",
"D. Stop for the night.",
"E. Status check.",
"Q. Quit.",
].join("\n")

function Game() {
  this.miles_traveled    = 0,
  this.thirst            = 0,
  this.camel_tiredness   = 0,
  this.blockos_travel    = -30,
  this.canteen           = 5,
  this.done              = false,
  this.oasis             =  function(){randomFromRange(8, 15)}
};

Game.prototype.welcome = function(){
  console.log(WELCOME)
}


Game.prototype.turn = function(){
  that = this;
  console.log('-----------------------')
  console.log(MENU)
  console.log('-----------------------')
  prompt.get( 'choice', function(error, result){
    that.parseResponse(result)
  });
};

Game.prototype.parseResponse = function(result){
  var choice = result['choice'].toUpperCase();
  if (choice === 'A'){
    this.glug()
  }
  else if (choice === 'B'){
    this.trot()
  }
  else if (choice === 'C'){
    this.gallop()
  }
  else if (choice === 'D'){
    this.rest()
  }
  else if (choice === 'Q'){
    process.exit()
  }
  game.status();
  game.checkInWithYourself();
  game.turn();

}

Game.prototype.checkInWithYourself = function(){
  if(this.thirst >= 6){
    console.log('YOU DEAD!')
  }
  else if (this.camel_tiredness >= 8) {
    console.log('Your camel must rest!')
    this.rest()
  }
  else if (this.blockos_travel >= 0) {
    console.log('YOU CAUGHT! you egg.')
  }

  else if(this.miles_traveled >= this.oasis){
    console.log('You reached an oasis! You filled your canteen and your belly.')
    this.canteen += this.randomFromRange(1, 5);
    this.thirst   = 0;
    this.oasis   +=  this.randomFromRange(8, 15);
  };
}

Game.prototype.glug = function(){
  if(this.canteen === 0){
    console.log("You're out of water!");
  }
  else {
    this.thirst   = 0;
    this.canteen -= 1;
    // blockos travel between 1-5 mi
    this.blockos_travel += this.randomFromRange(1, 5);
    console.log("You drank from your canteen. You have " + this.canteen + " drinks left.")
  }
};

Game.prototype.trot = function(){
  // travel between 5-12 mi
  this.miles_traveled  += this.randomFromRange(5, 13);
  this.thirst          += 1
  this.camel_tiredness += 2
  this.blockos_travel  += this.randomFromRange(1, 10);
  console.log("You are traveling at a trot.")
  console.log("You have traveled " + this.miles_traveled + " miles so far.")
}

Game.prototype.gallop = function(){
  // travel between 11 - 20 mi
  this.miles_traveled  += this.randomFromRange(11, 20);
  this.thirst          += 2
  this.camel_tiredness += 3
  this.blockos_travel  += this.randomFromRange(1, 10);
  console.log("You galloping!")
  console.log("You have traveled " + this.miles_traveled + " miles so far.")
}

Game.prototype.rest = function(){
  this.thirst         += 2
  this.camel_tiredness = 0,
  this.blockos_travel += this.randomFromRange(1, 10);
  console.log("The camel is happy that you have chosen to stop for the night.")
}

Game.prototype.status = function(){
  console.log('-----------------------')
  console.log('Miles traveled: ' + this.miles_traveled)
  console.log('Thirst level: ' + this.thirst)
  console.log('Camel tiredness: ' + this.camel_tiredness)
  console.log('Blockos distance behind you: ' + this.blockos_travel )
  console.log('Drinks in canteen: ' + this.canteen  )
  console.log('-----------------------')

  console.log(this)

}

var game = new Game();

game.welcome()
game.turn()



///HELPER METHODS

Game.prototype.randomFromRange = function(min, max){
  return Math.floor(Math.random() * (max - min + 1)) + min;
}