Cool system, has a lot of potential if you utilize it in a bigger project and develop a full game based around it.
As it stands right now, it's kind of dry. Sprinkle in some more flavor as in more content, and it might be worth some money if you wish to create a pretty good adult game project.
Then again, this is just my opinion. And if you're not planning on creating a complete game experience, that is fine. It's a neat little thing as it is. You do you.