Algodoo

Why is this Algicosathlon? The competitors are actually marbles. See animation for details.

40 marbles! You may run your very own season of Marblecosathlon! Only one winner each season!

You may customize events! Yay! Useless fact: my favorite marble is Cyan.
This is a template. I'm currently running my very own season, just to prove that the template...
actually works. You can use this template to run your Marblecosathlon! (Sorry if you don't understand
English.) Anyway, click Play to open the template! Then watch the animation for what to do.