I wouldn't say ripoff... maybe heavily inspired? I mean seriously there are at least a hundred and one ways to make an urban 2-D RPG. What are the odds that Graal X would look so similar? Just saying...
Dunno who you're trying to fool. Tyrial was the same about his playerworld when I claimed he was copying Oasis. He denied it to the fullest and yet later he told me that he was influenced a lot by my work and that it was true that a lot of it was copied. (he might not have used those exact words but he pretty much admitted that it wasn't a coincidence)