Ive got a couple of pinnies in the shed that are earmarked for a re theme ( Oh god give me the time and space!).
Anyway, my thoughts were for a "Surfin Dead" which is actually the name of  a band my mate has had for nigh on 30 years... its based on surfing zombies. No real depth to the game as all I work on are EM's but figured the artwork would be cool.. chuck in a few ramps, zombie bonus points etc.
Another is a Nikola Tesla machine.. seeing as im working with EMs I can get away with a lot more static wise, so id have a mini Jacobs ladder.. some neon, Van der Graaf generator and plenty of splash on the coils!.. Free games are called Free Energy.
Game would come with its own fire extinguisher..LOL!