After looking into the issue, I think it might be an itchio thing. I can run the game on my macbook.
Troubleshooting:
- If a popup says that apple "could not verify" the game, you can use this official apple guide to get past it: https://support.apple.com/en-us/102445#openanyway
- You can also try this if it says the app "can't be opened": right click on the App file and click "show packaged contents" then "MacOs" then clicking the exec file. "Show packaged contents" shows the proper game directory and internal files. You can also try right-clicking and choosing "Open" on the ".app" file rather than just double clicking.
- If that's not the issue, try using the itchio app version to install the game: https://itch.io/app itchio says "Many operating systems can make it challenging to run games downloaded from the internet through your browser. The app tries to smooth out all those issues."
- It may be an issue with MacOS. Games should work better if they aren't in the all zip format, or are launched by another application (like Steam or itch.io app version)
If these don't work, let me know and I will try to change the code and re-upload. Please tell me if there is a specific error message that pops up, or any other info, to help find the issue. It should work better on Steam automatically because Steam seems to do some extra code-signing processes! I got this by searching online, I'm kind of clueless since it's my first serious game. Hope it works :)