I had the same problem with other downloadable Unity games. I believe it is something in the settings that it has to be changed to either x84 or x84_64
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Oh, you too? I'm so sorry, I'm having trouble figuring out what the issue is exactly, but I'm currently planning on releasing a WebGL version, in which you don't have to download the game and you can just play it right from the Itch page instead (and hopefully that will work for you and others). I'll reply to this again when it's out!