It does not appear that index.php is set as a directory index for your web server. If you can provide a few details it’ll be easier to help you sort this out.

What operating system or one-click image did you use to create your droplet?

What steps did you take to set up your droplet after creating it?

If you modified your Apache configuration can you share the contents of your config file in /etc/apache2/sites-enabled/?

I figured out the problem, I spelled index.php wrong :P