Grand War: Rome Strategy Games -- how to hack player level?

[spartakus666]

Hi everyone, I hope someone can help me with this game "Grand War: Rome Strategy Games" 

https://play.google.com/store/apps/details?id=com.rome.caesar.war.strategy.conqueror.games&hl=en&gl=US

I tried to modify that value (player level) but I can't find it at all, 

any help or guidance is greatly appreciated. Thx