Roflpillar is an experimental game where two players lie on the ground and wiggle around to control two caterpillars on screen. So far it has been shown at a bunch of places, including:
There’s a nice writeup about it over on indiegames.com which talks a bit about the development of Roflpillar, along with some technical and conceptual background.
Originally built for Game City Nottingham, we created a little fort with some fabric and wood to hold a screen facing downwards. Players would lie down, strap on the belts, and squeeze their heads inside to start playing. The screen is just a few inches away from the player’s noses, the graphics are bubbly and silly, and pretty much everyone who plays walks away with a smile on their face.
It’s always quite a hit, with tons of people playing (including an amazing number of 4-year-olds). As an added bonus, it’s a wonderful experience for spectators.
A video of an early version of Roflpillar from Game City: