I'm also getting the "Failed to load the game data. File seems corrupted." error when launching on Win11 via the "Launch" button in the itch app – however, if I just double-click the .exe in Explorer, it launches just fine 👍
Oh, sorry it’s not working with the itch app! It is an Old Game now, and I don’t really know how it will continue to behave as computers get more and more fussy. Glad it’s working in Explorer though!