I hit some sound issues in the Linux version, for anyone else with the same problem telling Steam to use Proton to run the Windows version instead is a workaround.
My only minor peeve with the sequel so far is that the logistics of moving stuff back to the central platform is pretty fiddly and time-consuming compared to the first one. I think there's an unlockable upgrade I'm nowhere near getting which might fix that though.
Yup, I too had issues with sound, the game seems to just use the first sound interface available, but it is relatively easy to change after starting (via KDE sound panel for me, but I imagine pavucontol should also work). The issue seems to be with Unity/FMOD on linux not the actual game. Newer versions of Unity seem to not have this issue and author was saying they are trying to see if they can upgrade.
PS I was attempting to make a pipewire LUA script that would auto connect the FMOD output to default interface but got stuck on querying and linking audio ports and interfaces, if someone has more Pipewire-Fu I am all ears!
My only minor peeve with the sequel so far is that the logistics of moving stuff back to the central platform is pretty fiddly and time-consuming compared to the first one. I think there's an unlockable upgrade I'm nowhere near getting which might fix that though.