Reverse engineering encrypted buffer of Growtopia

I tried a lot but i couldn't reverse engineer second argument (buffer) of WSASendTo of this game, so then i can view unencrypted packet data and move on my way. Apparently it uses UDP.

Growtopia :

The links of the stuff i've tried :







Do I Need to be good at Game Hacking to get into Server Emulation - RaGEZONE - MMO development community

http://forum.ragezone.com/f860/reversing-packets-emulator-server-scratch-1136480/

i will be really apprecited )