The game would constantly freeze (not even being able to complete a single race in the first event or multiple consecutive tutorials) with the default proton (7.04 at the time of writing), and proton experimental, as well as a bunch of more recent versions of Proton-GE. Switching to Proton Version 6.3-8 on the steam deck would run the game stable without any crashes (I was able to finish a few events), the audio crackles slightly during the developer/publisher intros but seems fine in-game.