Um, people. Since this topic is starting to become a big problem, I'll release my thoughts about "this problem" to you.
I don't think ZTaimat would be such a person to completely 'imitate' one of the original Sonic Robo Blast 2 levels. He does have a great imagination. He showed this to us when he created a level named Castle ZTaimat. It is a very interesting level, and he just used his own imagination to create that.
When he made this level, Tsukei River, it seemed that his plain imagination when making this level somehow was similar to that of the creator of Sapphire Falls. ZTaimat wouldn't be a person who plagiarizes, and I do agree with all of the things he's saying.
For those who agree that this topic should die, then don't post anything after this message.