Flu! puzzle description:
Safe the farm and vaccinate all infected piggies in this chain reaction game brought to you by kegogrog (blog.natan.info)
You got only one load of antiviral serum. Release it anywhere on the screen and start a chain reaction. Do not hit the pink piggies as they are healthy. 3 modes, 19 levels each, 4 kinds of piggies and 4 different obstacles.
This game is made from a tutorial on blog.natan.info.