Algodoo

there is a way : use arrays instead of strings

put this code in onCollide (white circle) :

(e)=>{(Scene.my.var1 == 1) ? {Scene.my.var2 = 1}:{}}

You can use my "Strings functions" library to erase symbols (you can find it here : http://www.algodoo.com/algobox/details.php?id=40356 )