

I found some icons and text were small to read. I was playing on a TV and I think a lot of PC games suffer from this problem.
There was the occasional audio gaps which I have experienced with other games on the Steam Deck but they lasted less than 5 seconds and did not deter from the playing experience.
We played local co-op with two PS4 controllers wirelessly using Bluetooth with the Steam Deck.
We completed this game in 2p local co-op exclusively on the Steam Deck with two PS4 controllers on Bluetooth. The Steam Deck was connected to a TV with the Steam Deck Docking Station. We have not unlocked any secret levels yet but we had no issues with the base campaign whatsoever.

No cloud sync, if you are deleting prefix, make sure you backup your saved data
Intro splash screen is broken but game plays very smoothly