How can I try this? 
I think you already tried with mudfish test credits. However it seems you didn’t try with FastConnect mode yet. I’d reset a mudfish test credit for you so you can try again with it.
No problem. If there are other issues to play with Mudfish, please let me know.
Full VPN 모드를 그 동안 사용하신 것으로 보이는데 혹시 해당 링크의 주의점을 살펴보겠는지요? ㅠ.ㅠ
Thank you for sending the packet dump. However could you confirm that you enabled Full VPN mode while playing the game? When I checked this game dump, I can’t see game related traffics. 
When you get a chance, please send me again.
can mudfish adding apps where it not inside equip item store
For this case, please check Unsupported Games as workarounds if you can’t find a game at Mudfish.