hello!! i may be able to help hehe
idk if you have figured it out by now, but i'm assuming you downloaded this game from the web (i, too, downloaded another game made by the creator of this one! its "married in red") bc downloading games from the itch.io website results with a folder in your downloads. you actually need a "launcher", or in simpler terms the app version of itch. just search up 'itch.io app' and the link for desktop app should pop up :D
hopefully this helps :))