Hi there~ So to the best of my current knowledge, this is a problem that can occur with certain games when someone tries to download them through the itch.io app as opposed to the itch.io website.
I just tweaked a setting that might solve the compatibility issue, so you could try downloading it through the app again to see if that changes anything. But if the issue persists, it may be something else to do with how the itch.io app is reading the game files, in which case your best bet for now is probably to download it through the website (and we can look into this more deeply for the next update).
P.S. If you try downloading it through the app again, please let us know if the tweak has fixed the issue for you, or if there's more that needs to be done~