That tileset was stolen. I made it, and darker submitted it, taking credit. His account on J2O has been disabled. Plagiarism is not something that can be dealt with softly.

As for the tileset, it won't be released. And you may not use it. I have decided that because I have had my work stolen from me that I will hold back all projects I am working on. This includes a pack of CTF levels and a tileset. This means that you will not be seeing any of my work for a while.