I just realized it leads nowhere, though it is a pretty cool story how I got there.
So I found out that you can change some of the code with inspect element, and it returns to normal when you reset. So I was playing with that, looking through the files (I like that ramen guy is called "ramen") and I started playing around with more stuff. At some point I found were the collision is stored and I deleted the "bump" code for platforms with id = 0. Then I just walked to the platform and it moved me off screen, though it wasn't an unfinished place, It was just nowhere.
The code is actually pretty cool and somehow I could understand it, and I've only watched one video to learn javascript.