It's something fairly easy to fix as other devs I've notified of the same problem fixed it instantly. I think it's something to do with the metadata regarding compatibility you set when you upload it to itch.
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The itch.io app reports this as "Not available on Windows" which is obviously not right. It's probably incorrect metadata of some kind. Can you take a look as it's impossible to install via the app currently.
Isometric: (in technical or architectural drawing) incorporating a method of showing projection or perspective in which the three principal dimensions are represented by three axes 120° apart.