Hmm, just bought this for $1 USD, and I can't download because it says the file comes from an incompatible website...are you able to confirm the file can be downloaded from itch? The demo version seems downloadable, but not the paid version...
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I was using the Itch app! But you're right, I just went to a proper browser and the download works, but it does redirect to a google drive download, rather than something hosted on itch. Seems like hosting it on Google Drive breaks it on the Itch app. I've got it on Windows. Don't even remember when I got it, it's kinda janky lol.