Cool, my plan is to use stong modern materials, but then hide it under staining, carving and distressing. IE Carve in marks that make it look like, its made from much smaller pieces of wood. Add little details like pin joints and iron strapping.
Oh and cuz its called peasant launcher, sew up a number of weighted peasant shapes dolls to chuck.
And if I can find the right parts (cheap), add a web cam into the peasants . So I can retrieve the footage of their travels. I think that would be a funny blog called "peasant cam".
Here is a game prototype http://www.shakar9.com/launcher.swf
I did a couple of years ago.