


Tried different Proton versions including GE, and have also tried forcing wineD3D like one of the comments here suggested, but nothing changed the game from always instantly crashing.
Works very fine
No issues found

In fullscreen the game goes to background when unlocking an achievement
Right after installing the game wouldn't launch, I had to restart Steam and it was ok after that.
Stability issues and slowness in particular menus, but overall playable out of the box
Level-select screen is extremely slow. If you are a completionist (going for ladybirds), this is pretty annoying since there is no way to repeat levels apart from going back to this screen.
Crashes regularly every ~45 minutes. Not actually as annoying as you might expect, since each level itself is very short, and frequently saves.

6.14-GE-2 GloriousEggroll
The game starts in fullscreen mode, if it ever loses focus while in fullscreen the game only renders a white screen until restarted. Swapping to windowed mode works around this issue and allows for alt-tabbing.
Level select menu has minor issues. No performance issues ingame.
Somewhat frequent "eventfd: Too many open files" crash. Doesn't seem entirely solved by PROTON_NO_ESYNC.
Under default Proton 6.3-5, I couldn't get it to display anything other than a white screen despite audio working (same issue as losing focus in fullscreen).
The game is probably playable to end if you wanted to due to frequent autosaves, but the experience is not amazing overall.