You can easily find the gold adress with a standard 4 bytes search. Just hit in 475 gold first in cheat engine. And buy some items after that when u got like 40 gold left do a 2nd search and only 1 adress will remain.
The problem is that you cannot change the value everytime i type something in the value box and hit enter, the value automaticly changes back to the value stored on their server. So a gold hack cant be done so easily you need someone to hack their servers and get the right info in order to make a working hack but its gonna take a lot of time and effort so its gonna cost money.
Btw i dont know if the freeze works didnt think so.