There's a SDL Perl book in the works[0], so that's a starting point, if anything. Also, it's not really what you ask, but check out this presentation of Lacuna Expanse[1]'s architecture.
Unfortunately, those are all the games I know made in Perl. Brian. [0] https://github.com/PerlGameDev/SDL_Manual [1] http://www.madmongers.org/talks/the-lacuna-expanse#idivf9lhRKlb-3I8YkXxHy3Q
