Holy shit! This looks incredible. I love seeing stuff like this on the NES. I'm currently obsessed with GTA: SA (and I'm going to pick up GTA for the GBA soon) and you couldn't have picked a better time to reveal this. I wish more people were creating games like this for the NES......
PLEASE make a cartridge! You have another sure customer right here. Shouldn't be too hard to burn an EPROM and print up some labels, right?