Make A Game Based Off The Well Known Game Agar.io

Hi, I need a Multiplayer game that can be hosted over a lan network. So there will be a client and a server here. I need the game to be based off the game agar.io. If you dont know what it is then check out the website. All the functions except the option of different server should be present. I will be needing test versions of the game so that I know you are staying on task. There are some files Iv'e attached witch were made in game maker. This should be how the multiplayer is set out. Although the platformer should be switched with the [login to view URL] game of course. thanks, Jess