I finally got around to doing the Homebrew and was browsing the downloads. There is a shareware version of Quake 1. Its going to take some practice but it feels great.
The one part that stands out though is the gun is oriented on screen based on how the wiimote is held. Turn the controller upside down, the nail gun goes upside down and held at the top of the screen. The goofy thing is if you flail around you can see the entire gun model, just floating in air.
If you have the chance and don't mind old old games check it out. Consider it a primer to the release of the Conduit. (Doom is available too.)