I designed a water game using gameboy advance as the user-interface.

Basically, users wear a harness with a water sensor.  When it gets wet, the
user hears a sound indicating that they've been hit, and their energy level
goes down (on the GBA). Here's the fun part: The water sensor uses a sponge
which is removable! So what does the user do? Remove the sponge, squeeze it
out, and put it back on in place (thanks to Velco!).

I kicked off my new website: www.h2game.com. I'm trying to get a feel for
what people think of it. The prototypes are done, and I've made a few of the
production versions. I'm also debating whether or not to make the code
open-source, or have a development club, or not.

Right now, I'm just waiting to see what the interest is, and any feedback.

Thanks,
Randall Desmond

PS.  I'd even consider licensing the idea, if there is interest.