I deleted my previous reply because i figured the problem out. you need to use Proton, i added the game through steam (Library, add game, add non game to steam, browse, then select the .exe file for the game) and then ran the game through steam. I had to tell it to run the game on proton in the management menu. runs smooth like butter now so far. just started and found the bit in kindheart's quarters. havent done anything else yet.
theres a few UI nitpicks and the ponytail hairstyle goes a little crazy in scenes. also looks like shes bungeeing on an invisible noose or something or shes done some insane calisthenics but the sound is really good and the game visuals are great.
quite a nice game youve got here my guy. looking forward to seeing new versions or new games.