I'm sorry you've run into this issue, I've looked into it and it appears the problem is on my end because I didn't use butler to upload the game. I've tried using butler in the past but ran into trouble and haven't used it since, so this is a good reminder for me to re-visit the issue so I can use it for future game uploads and avoid having app users run into this problem!
Are you able to download this game from the itch site? (As opposed to using the app) If not, try this Google Drive link that should allow you to download the zip file:
https://drive.google.com/file/d/1xC1HgfjYSBxll8m9qQM0JRed30930N_l/view?usp=shari...
Apologies again, hopefully using the site or Drive link will allow you to download the game! Let me know how it goes.