I was actually behind this guy for a while, but when he says stuff like, "I am far better than Miyamoto, Itoi, Kojima, Carmack, and Wright COMBINED." I have a real hard time taking him seriously.
I'm always impressed when someone creates a game single handedly. I know first hand how hard it is to learn to program and do art. But just because he is making it alone does not mean the game will be great, even good. Cave Story proved it was possible, but it is still not the norm. I think he should release a demo. The video of the game was alright, but I could hardly tell what was going on.