Write a Userscript in Javascript for Agar.io

I want a userscript made for a game site called agar.io. The userscript that I want made adds more functionality to the game than it already has and changes the way the game looks like that is, it changes the default layout of the game site. This project requires some skill so I only suggest developers experienced in making complex userscripts for sites to bid on this project. I have a working example of the userscript (which is not mine) that I want made for the game site [login to view URL] which is similar to what I want. Once a bid is finalized I will provide that userscript along with some files which is my work for the userscript that I want made so you don't have to start from scratch, instead, pickup from where I left. I left because the project is more complex than my capabilities. The userscript is to be written in javascript. Before you bid on this project, I recommend you check the site [login to view URL] out and the client code on agar.io. Lastly, I would appreciate sensible and quality bids on the project as I want to start immediately. Thanks.