Purely Functional Retrogames

The actual post linked here is basically an intro and is kind of "meh" by itself, but the series of posts it introduces is quite good and answers a lot of the questions people have about how you do a seemingly "imperative-style" application in a purely functional language.

If you like this series of posts, get yourself a copy of The Haskell School of Expression [0]. It covers various multi-media applications of Haskell, including reactive animations.<p>[0]: <a href="http://www.cs.yale.edu/homes/hudak/SOE/" rel="nofollow">http://www.cs.yale.edu/homes/hudak/SOE/</a>

What I would really love is a post--or series of posts--just like this, but using FRP so that everything could be purely functional. Perhaps something like this exists already?