Thanks to volunteers from r/SteamDeck, we've been able to get an early confirmation that Goldenheart is running happily on the deck and the controls are working correctly with no configuration needed:
"Runs at 60fps/60hz no problem while limiting to 10 watts on battery [...] I touched nothing. Default proton."
We're nonetheless continuing work on optimizations for the Steam Deck, including support for 1280x800 resolution.
To join our testing pool, report bugs, provide feedback, and hang out with other players and the developers, you can join the Goldenheart Official Discord.