Playing on iphone over Steamlink w/ third party controller


I did my best to search for the answer but came up empty. I'm trying to play portable on my iphone over Steamlink. I can get the game to run just fine by adding the .exe to Steam as a non Steam game. I can get logged in and into a ship as one of the face buttons seems to work as a confirmation button. But once I am in character I can't move, or do much of anything other than sit in the little emote chair or hit the confirm button. If it helps, I am using a razer Kishi controller plugged directly into my phone. Anyone had any luck doing this? I've tried fiddling with the Steam controller configuration without any luck. Thank you in advance!