Most of the features right now are copied directly from tutorials. The only features that are original are the models, skybox, and velocity.
Extra: I'm going to try to submit this to Steam as a free/$0.99 game under Indie and Adventure. If it doesn't get approved, I'll probably post it on here, and maybe the Xbox Live store.
With XNA you can easily port your games from Windows over to Windows phones and other devices, not sure about the PSP.