Access node app on digital ocean - This site can't be reached

I am unable to access my digital ocean node js app. I've already SSH'ed in, cloned my Node app from Git, npm installed, and successfully started the app on the droplet, yet I get error

This site can't be reached

Digital Ocean docs say you can access your publicly facing website simply by going to <your website's ip>:<port>:

I did this by going to 67.205.185.63:9000/ (my app is running on port 9000 as you can see):

root@nodejs-512mb-nyc1-01:~/demos# npm start

live-demos@1.0.0 start /root/demos

node app.js

Demos is listening on port 9000

How else should I be accessing my node app?

var express = require('express');
var bodyParser = require('body-parser');

var app = express();
var port = process.env.PORT || 9000;

...

app.listen(port, function () {
    console.log('Demos is listening on port ' + port);
});