The player starts on a snake platform moving in a cycle. While he moves, loses his energy, and he must catch opposite entities to stay alive. Everytime the player makes a cycle, his life gets full recovered and gets more speed.
The original concept of the game was more complex, but we had to simplify it in the process. We'll try to make a more complex version in the near future.
Here you have a little more info about the GGJ in Uruguay, and about the game:
I got to play your GGJ2010 game :)
Thanks for your comment.
Fun game :) and good to see Uruguay had a game jam this year - and decently sized.