One of the first things I want to do for ONI PUNCHER is similar to what I did for Aim For The Head; namely, an introductory adventure to show people what I was thinking about when I made the rules.
One of the reasons, I think, that oD&D took off so strongly was that it was possible, through the adventures and modules and ramblings of the creators, to see exactly what the first DMs were getting at. You get a very good sense of what Gygax was like when you read what he produced. You get a very good sense of what Arneson was like when you read through his material, as well. It's not quite as good as having them sit down and play a game for you, but it's pretty close.
(That reminds me, I never included rules on how to lose in Oni Puncher, or how your Punchers might be defeated. I might have to add something in!)