I tried to run version 1.8A on the Steam Deck, but it only boots until the Unity loading screen and then crashes. Does anyone already make it run on the Steam Deck and can share their settings? Sadly the actual Steam version is not available in my region so i need to use the version from itch. I already managed to make a couple of games run on Steam Deck, so I wonder if there is any special settings I need to do...

I fiddled around a bit on my own but couldn't make 1.8A run. 
But I just saw this Post by ckyman that covers most topics which I found by testing around: /post/15431239

So I'll wait with more testing and hope that 1.8B fixes the issues I came across.

So, the 1.8D Updates seems to have fixed whatever issue i was having. Now, the Game starts on my SteamDeck without issues. Haven't playtested it a lot, though. But at least it starts, now.