This seems to run okay, but the resolution defaults to 960x540 which looks very blurry on a 1080p monitor. Luckily "Options" on the main menu was readable, and changing the resolution made the text readable. Launching a second time again defaulted to 960x540, but for some reason it wasn't blurry this time. Keyboard controls are very unintuitive, there are no instructions or options to remap/rebind keys, and what few button prompts there are are for a controller, whether or not one's plugged in. These appear to be problems with the game itself, rather than with proton, so I've given it a platinum rating.