User blog comment:Dung Dinh Anh/SECRET LEVEL! LEVEL 6-1!/@comment-5792287-20130713145015

One of the comments from the uploader:

1. Bonus slots﻿ aren't required. You don't need them.

2. I changed to level 6-1,I didn't play the whole adventure. I didn't want to do it on my real profile because it can mess it up.

This proves that he edited the level! It's a modified level, end of discussion!