• Ubuntu 16.04LTS (4.4.0-79-generic)
• nodejs v4.2.6
• gcc version 5.4.0

cd agar-io-clone

• Install the dependent modules

  npm install

• Start the agar server

  npm start

cd ../src 

• Compile the joystick-handler.c

  gcc joystick-handler.c

• Start our implemented driver

  node driver.js

• If you would like to play the agar, you can open the browser, keying http://localhost:3000/ in your URL

• You can change your serverport in the file agar.io-clone/src/server/server.js if you wanna change the http listen port

• nodejs

sudo apt-get install nodejs