It a strange mix of disappointment and excitement to find out someone has just released a better finished version of what you were working on. Oh well, I guess I'll finish it anyways.
It has mutated quite a lot since I started... I'm taking the positions of everyone's mouse and feeding them to Fortune's sweep line algorithm to make Voronoi diagrams. I've made it look like you are a cell squeezing through layers of tissue.
http://uncc.ath.cx/applets/Voronoi_Standalone/