The app was working until the latest version of MacOS (Sequoia). Now it's fully crashing and likely unusable until an update is pushed.
Viewing post in Problems to run on MacOS ? Check this solutions.
after digging around it seems like they arent even working on a mac version anymore
https://itch.io/t/3697699/mac-os-support-should-be-removed-from-the-store-page (second post, by CodeManu)