We made an "assymetrical cooperative mashup of shoot'em'up and platform-management" game for the GGJ13!
Ever wondered what happens inside a shmup spaceship? You know, when you get damage, collect power ups, grab a bonus...? Well now you can see - and play inside it! :P
So, if you take the role of Moustaccio, you have to grab the Power-ups that are delivered to you, and feed them to the machines that'll give your giant robot boosts, or ammo for different weapons! Any damage the robot takes may destroy the machinery, so you'll have to use the repairs to fix them. If all 3 machines are busted, the game is over.
As Billy Robot, you'll have to destroy ships, avoid taking damage and collect whatever powerups appear on screen, so Moustaccio can provide you support.
We built this game for an arcade we are building, so the idea was to get 2 players working together and shouting at each other. I think we were very successful on this task :P
GGJ Link: http://dl.dropbox.com/u/7324985/Moustaccio/index.html
Play online at: http://globalgamejam.org/2013/moustaccio-billy-robot