You don't think anything bad happened to the creator, do you?
No, the hack is a collaboration project. Each level, the map, and musics were done by different authors. If I'm not mistaken, over 100 people worked on the levels, but they always had to struggle with bugs, members giving up or even lack of interest. Also, this project is very ambitious (Around 100 levels, lots of new musics, cutscenes, bosses, etc.)
Here, I got some screenshots for you: