It is for sale on Indievania in a "pay what you want" model. You can even get it for free.
I'm also working on getting it on IndieCity.
I don't expect many people to want the Windows version of this game. It's always been a couch-and-TV kind of game, but maybe you have a computer or laptop that you can hook up to your TV.
But if this is something that you're interested in, hey, have a free copy. Hope it works out for you!
I found the best way to play is by importing the shortcut to Hidden in Plain Sight into Steam ("Add a non-Steam game to your library"). Then opt-into the Steam "Big Picture Mode" beta.
But don't believe me... observe this commercial: