In the past hour I developed a little script that will let you test your skins! (It will display a circular cell and a name of your choice).
I haven’t put any time in styling it properly, it’s about the main functioning
1. Install the script in Tampermonkey.
2. You need to go to http://agar.io/skincheck . It first will be an 404 error, but if you got the script in place, it will change soon.
Click here to download
(Dont worry about the name CoDo btw, thats my undercover name on google+)
P.S: Use quadratic skins!!