Not a bad start, although Nintendo legal may hassle you.
My only complaint is that the two times I've played this, it's locked my computer up solid! Not since OS 9 have I found a program that could so completely freeze a system up! How'd you manage that in OS X?
I had to hard reboot both times, and never finished the first level. I'll admit it was kind of fun for the brief time it worked!
Keep up the work, you're onto something here. . .