how'd you get it to work? i added it to my steam library and forced compatibility with proton but can't seem to run it.
sorry for such a late reply ><
it just pointed steam at the executable, set the "start in" location to the containing folder, and explicitly told it to run using proton experimental. might be worth checking that the .exe is targeted properly, the spaces might make things messy ^~^
ran it on the steam deck, if hardware comes into question