On BGG, a person recently submitted a step-by-step explanation of how they made a homemade version of a game called Survive!
I think a lot of the techniques he used would be good for our own prototypes.
Here's a link in case you didn't see it...check it out!
http://www.boardgamegeek.com/geekjournal.php3?action=viewcomments&journalid=5980
To see the results, here is the images page for Survive! I think his pictures are the first 6.
From the box top
http://www.boardgamegeek.com/image/64344
I want to play this game just to know how those people can survive all of those monsters -- not to mention the volcano.
It truly is a sea full of danger.