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I've tried both versions, the original gets an alert that says it can't be opened. V2 gets this: 

“AShortHike” cannot be opened because the developer cannot be verified.

macOS cannot verify that this app is free from malware.

Chrome downloaded this file today at 19:51 from adamgryu.itch.io.

Right-click on the app and choose Open from the contextual menu, and it will prompt you to confirm that yes you really do want to open it. That is a security measure, I imagine, to avoid unintentionally opening suspicious software.