Firstly you need to download the client from
http://173.242.112.40/Mir3/Cozy%20Mir3.rar
Then while/after downloading you need to make an account to login to the server. You can make an account at:
http://173.242.112.40/Mir3/Account
Cozy Mir3 is 100% free to play, here is a small video clip of ingame footage.